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Drama: Undercover High School
Revised romanization: Undercover High School
Hangul: 언더커버 하이스쿨
Director: Choi Jung-In
Writer: Im Young-Bin
Network: MBC
Episodes: 12
Release Date: February 21 - March 29, 2025
Runtime: Friday & Saturday 21:50
Genre: Action-Comedy
Language: Korean
Country: South Korea

Plot Synopsis by AsianWiki Staff ©

Jung Hae-Seong (Seo Kang-Joon) is an ace field agent for the National Intelligence Service (NIS). After a big incident occurred during an operation, Jung Hae-Seong receives a demotion. He is placed into an operation to locate the whereabouts of King Gojong’s missing gold bars. For this assignment, he hides his identity and goes undercover as a student at prestigious Byeongmoon High School. There, he meets Teacher Oh Soo-A (Jin Ki-Joo) as his homeroom teacher.

Oh Soo-A is a contract Korean history teacher with an upright personality and she holds strong affection for her students. One day, Jung Hae-Seong is transferred to Byeongmoon High School and she becomes his homeroom teacher. She begins to see her first love, from her childhood days, overlap in Jung Hae-Seong. Her first love caused the biggest wound to her heart.

Notes

"Undercover High School" takes over MBC's Fri & Sat 21:50 time slot previously occupied by "Motel California" and followed by "Crushology 101" on April 11, 2025.
First acting role for lead male actor Seo Kang-Joon since he completed his compulsory military service on May 22, 2023.

Cast



Seo Kang-Joon	Jin Ki-Joo	Kim Shin-Rok
Jung Hae-Seong	Oh Soo-A	Seo Myeong-Joo

N.I.S.



Jeon Bae-Su	Jo Bok-Rae	Yoon Ga-I	Lee Seo-Hwan	Lim Chul-Hyung
Ahn Seok-Ho	Go Young-Hoon	Park Mi-Jung	Director Kim Hyung-Bae	Kong Jin-Sang

Kim Nak-Gyoon

internal affairs officer (ep.10)

Byeongmun High School Student Council



Kim Min-Ju	Park Se-Hyun	Jang Sung-Bum	Lee Hyun-So	Yoon Chae-Bin
Lee Ye-Na	Ahn Yoo-Jung	Park Tae-Soo	Han Seung-Jae	Yoon Chae-Rin

Kim Sun-Min

Ji Hyun-Joon

Byeongmun High School Students



Shin Joon-Hang	Jeong Soo-Hyun	Kang Pil-Jun	Shin Ga-Eun	Kim Seung-Beom
Lee Dong Min	Lim Yoon-Cheol	Son Beom-Sik	Choi Soo-Jin	Kim Ho-Jin



Chae Yoon	Yang Ji-Hun	Keum Ye-Sol	Mo Yoon-Hee	Hyo Dan
Kang Gi-Yeong	Heo Jun-Yeong	Kang Hee-Jin	Han Tae-Yi	Choi Hyo-Joo



Kang Soo-Min	Kim Ye-Joon
Do Eun-Jung	Cheon Sang-Hoon

Byeongmun High School Employees



Kim Eui-Sung	Park Jin-Woo	Oh Yong	Lee Min-Ji	Ro Jong-Hyun
Seo Byung-Moon	Park Jae-Moon	Baek Gwang-Doo	Kim Ri-An	Lee Joon-Ho



Goo Min-Hyuk	Kim Sung-Joon	Park Young-Bok	Kim Sung-Yong
Kim Hyun-Ho	teacher	security guard (ep.2)	CCTV room staff (ep.5)

Byeongmun High School Ghost Stories Students



Jang Se-Rim	Kang Su-Bin	Su Hyeon	Lee Hwi-Seo	Shin Dong-Jun
bullied student (ep.2)	bully student (ep.2)	#2 student (ep.4)	piano student (ep.6)	piano club president (ep.6)

Oh Soo-A's Family



Kim Young-Ah	Park Seol-Ha
Im Chung-Ha	Oh Soo-A (child)

Jung Hae-Seong's Family



Oh Eui-Sik	Yu Ji-Wan
Jung Jae-Hyun	Jung Hae-Seong (child)

Ahn Seok-Ho & Ahn Yoo-Jung's Family

Kim Soo-Jin

Jang Man-Ok

Gambling Ring



Jo Jae-Yun	Park Hwa-Hong
Gu Sang-Tae	gang member (ep.2)

Others

Lee Seo-Young

Park Min-Ji



Li Yongqun	Chae Hoon	Kyung Ki-Hyun	Shin Dam-Soo	Shin Yun-Sook
blackmarket buyer (ep.1)	restaurant hoodlum (ep.1)	restaurant hoodlum (ep.1)	Assemblyman Park Min-Cheol (ep.1,3)	Choi Bok-Sun (ep.2-3)



Lee Bum-Chan	Yong-Jin	Choi Kyung-Sik	Baek Kil-Sung	Lee Dong-Gi
Lee Ye-Na's driver (ep.3,5)	detective (ep.3)	detective (ep.3)	Kang Sung-Woo's dad (ep.3)	Kang Sung-Woo (ep.3)



Park Jung-Eon	Ahn Nae-Sang	Kwon Tae-Won	Joo Suk-Tae	Yoo Dam-Yeon
student's mom (ep.3)	neighborhood resident (ep.4)	Chief Editor Yoon (ep.5)	Han Seung-Jae's dad (ep.7-8)	Ms. Do (ep.7-8)



Kim Dae-Geun	Jung Eui-Wook	Han Chae-Bin	Lee Dong-Soo	Ma Jung-Pil
gang member (ep.10)	Detective Cho Sang-Cheol (ep.11-12)	hotel receptionist (ep.11)	foundation executive (ep.12)	foundation executive (ep.12)

Yun Ki-Chang

prosecutor (ep.12)

Additional Cast Members:

Ko Kyung-Man - Minister of Education (ep.1)
Ahn Chan-Woong - Byeongmun High School control room staff (ep.7)
Park Jae-Wan - judge (ep.12)

Trailers

Episode Ratings

Date	Episode	AGB
Date	Episode	Nationwide	Seoul
2025-02-21	1	5.6%	5.8%
2025-02-22	2	6.6%	6.5%
2025-02-28	3	6.6%	6.7%
2025-03-01	4	8.3%	8.3%
2025-03-07	5	7.2%	7.0%
2025-03-08	6	6.7%	7.1%
2025-03-14	7	6.8%	6.3%
2025-03-15	8	6.1%	6.1%
2025-03-21	9	6.1%	5.8%
2025-03-22	10	5.4%	5.3%
2025-03-28	11	6.0%	6.3%
2025-03-29	12	5.8%	5.8%

Source: AGB Nielson

Awards

2025 MBC Drama Awards - December 30, 2025
- Grand Prize (Seo Kang-Joon)
- Best Actress (Jin Ki-Joo)
- Best Drama
- Best Supporting Actress (Kim Shin-Rok)

Comments

Ulinurina Dec 30 2025 10:23 am Yeaayy.. I'm happy tonight, congrats guyss You know right ? The reason who make me so happy tonight :)

Agent Jeong Dec 23 2025 1:35 pm Fortunately.. the antagonist do not commit suicide!! Therefore i give 10/10 for this drama!!

Noona Dec 23 2025 1:33 pm Will it be season 2???? Seokangjoon soo coolll!! Plss more romance n skinship for S2!!!!

Co Nov 12 2025 5:53 pm Very interesting. Seo kang Joon Comeback Movie!! I love what I'm seeing. I always knew that you were a great actor. Your skills flows through your work effortlessly. You can only be born with this kind of talent. Great Job!

llou Sep 20 2025 7:54 am okay so this was really good? i haven't watched a newer kdrama in a while and i always trust in kang seo-joon's acting so i watched the first episode and it was really good! immediately binge-watched the rest and i really enjoyed the series! i'm glad they made it a 12-episodes drama and didn't try to needlessly prolong it into a 16-episodes series. the acting was great, the comedy had me crying at times(end of episode 4?? had me screaming) and all in all, the story came together great :') i saw some comments saying the romance was forced but honestly, i didn't mind! in some scenes it did seem rather extreme to go from Huge Threat On Our Lives to Silly Romance but i guess that's just the thing with most kdramas. so yeah, i do recommend this one!

moresojuplease Aug 29 2025 10:55 pm ★ ★ ★ ★ ★

All these little negative comments I cannot relate to but everyone is entitled to their own opinion. I totally agree on this being worth to watch overall. There wasn't as much romance which was fine, because I live for dramas that have a bit of everything whether it be action, romance and comedy all in one but action and crime more and this covered it all for me. Honestly in a few years i'd probably binge this again when I forget about it. Although I'd love a season two, I think the ending was great end where I don't think another season is necessary but if ever there is one of course I'm going to watch. Thank you for an amazing watch.

Agent Soju signing out.

Yeruchii Jul 24 2025 4:12 am I like everything here but I wish there wasn't any romance because it felt rather forced. The chemistry wasn't giving. But apart from that I enjoyed this a lot minus the romance. I've watched Jin Ki-joo for a long time now and I always enjoy her acting. This is my first time watching Seo Kang Joon. The only time I saw him at screen was during a reality series called Roommate so I'm really surprised by his performance here.I was floored. He's a gifted actor.

niesse Jul 24 2025 12:55 am imo, this drama is the best action comedy drama. love the acting and the plot execution, absolutely perfect! the comedy flows naturally and doesn't seem forced. i laughed throughout the episodes. love it <3

roseanne23 Jul 09 2025 2:23 am first of all, i like this drama. just finished it today. i love kangjoon, i watched this because of him lol plus jin kijoo is so cute. i always end up loving her when she's in the drama i'm watching. i enjoyed this but i find the dad so stupid. it's so frustrating especially the reveal. seeing the gold pissed me off so much lmao. i'm like is his dad fcking serious. so unreasonable. anyway i dont think i'll rewatch it lol but it's good in its own way. this is just my initial thoughts after finishing the drama so it's not very organized lmao

Agent K Jun 25 2025 1:25 am Although there is some part that takes too long to solve and seems boring, this K-drama is worth watching. And the plot twist they give is something that we can learn in real life. Like, we always go far away to find the treasure, but it's exactly near us, and from the process we did, you can learn something new.

I need season two! I want to see Ahn Yoo Jung work as an NIS agent alongside her father and oppa.

MGL Jun 08 2025 4:31 pm Don't believe all the negative comments. Give it a try! I parked this for so long and just decided to watch it yesterday... and I finished all episodes in a day!!! It's super good! And I just want to say that I super love Jin Ki-joo!!!

Bunnysoy Jun 04 2025 3:41 am I have nothing bad to say about the acting but a lot about the writing. Actors and actresses were pretty on point. They managed to portray their characters how I think they should have been played as they were written (in my opinion). My problem was the writing. I tried as hard as I could to suspend my beliefs especially in reality and logic but a lot of the situations were so forced that it became frustrating at times. I know this could just possibly be a writing tool to generate anticipation as to what will happen next but honestly it had the opposite effect on me to the point where I almost didn't want to bother finishing the series. Lady villain had so many years to solve the riddle from when the agent dad "disappeared" and the agent son took over the case but as soon as our MC took over the case lady villain suddenly became so intuitive as to how the MC will proceed and at times even beating MC to the punch in some cases. It took her that long to finally decide to just "take the place apart" in order to look for the missing gold. The part where they tried to sow doubt whether his uncle was the traitor or not was so obvious that it didn't really add too much to the story when MC cleared him of his doubts. And the way he was cleared was so lackluster it kind of made me go "that's it? you built up so much tension only to prove that the uncle was not the bad guy in such a lame way?" I'm not even going to bother with how clueless they made the teacher. Sure it made for some funny situations but there were some scenes where she was just completely devoid of any common sense. I won't say I hated it but I won't say I loved it either. Worth watching? Reluctantly, I say ok. Worth rewatching? Maybe not. Unless, of course you are a big fan of the lead/s. Because, let's face it, fan's will love their idol's work no matter what.

Ddeonu May 24 2025 8:38 pm I just finished watching this last night. For me pretty exciting, the romance scene is also a little.And funny. This is the first time I watched the drama played by Seo Kangjoon.Good acting. All the players in this drama are good acting.

Kristine May 24 2025 8:28 pm About 20 years of Kmovie and Kseries I have watched and I could not make it through the 2nd episode. Violent. Awful.

Hated it.

kizable May 21 2025 6:51 am The best k-drama series! The drama and actors are both great and amazing!!

Anita M Brown May 18 2025 7:10 am So very thankful for kdrama. This was wonderful. Great casting and wonderful mysteries and plots. Even with comic hand combat, the skills were great for the camera. Ended beautifully.

viola May 17 2025 5:45 am One of the best dramas I have watched tbh and I usually dont even say that about a lotta dramas. The plot was executed very well.

ruka May 15 2025 9:39 am I'm 1/4th thru the series and this may not be for me. I know the actors are adults and their characters are adults, but the teacher crushing on her student and giving him special attention is creepy to me because she doesn't know he's undercover. From what she knows, he's underage, a minor, who is supposed to be under her care and guidance. And the undercover agent isn't helping either. He knows he's supposed to be playing the role of a high school student, but he's not very careful with his interactions with his teacher. Like he's trying to tempt her—gazing too long at her eyes, flirting by bantering, stroking her hair by removing a petal. Aside from the creepy context of homeroom teacher-student relationship, they used one of the kdrama tropes that I find super cringe and fockin annoying—the woman (teacher) tripping and grabbing the man (student), causing them both to fall on top of each other. they share an accidental kiss, and all of these happening in slow-mo.

kaito May 15 2025 6:33 am Just finished episode 3 and i'm already struggling to finish. I'm intrigued by the mystery of the 4 school ghost stories and how that might lead to the location of the treasure, but other than those and Seo Kang Joon's ridiculously gorgeous face, this series feels exhausting so far. The NIS seems incompetent and disorganized—why is a bumbling idiot the director? The supposed prestigious school seems superficial. Only the campus looks "prestigious" but it still contains unruly, vapid, cowardly sets of students and faculty like any other regular school. There's nothing to show the "prestige" of the school.

The FL character is starting to annoy me. I get that they're trying to be comedic but the exaggerated expressions she does whenever her character talks to herself and thinks out loud seem to be desperate attempts to be funny but failing. Also, it's a little creepy that she's so hung up on SKJ's undercover character. A teacher who's always thinking about one student and focusing on just him. I get that she suspects he's a bully, but instead of paying most attention to him, a suspected bully, she should be paying more attention to the victim. She already suspects that Dong Min is being bullied but instead of reaching out and watching over him, she interacts more with SKJ. I get it, he's so freakin handsome and Dong Min looks like the stereotypical outcast. No doubt the delulus would want to spend more time with SKJ, but her character was supposed to be a.fair and principled caring teacher, but with SKJ's character, she's acting more like a boy-crazy stalker. I wish they just left out the romance altogether because even though he's undercover, it's still creepy watching a teacher crushing on one of her students. She tries to act annoyed and considers him a "problem student", but the amount of time she thinks about him makes it obvious that she's crushing.

I'm continuing to watch because Seo Kang Joon is so damn beautiful and my eyes love looking at him, and also I want to hear the 4 ghost stories (I wish they just went the horror route because that fast-crawling ghost freaked me out) and intrigued at how those would lead them to finding the treasure.

joyash May 12 2025 6:29 pm The plot of Undercover High School is actually nice and promising, with the idea of infiltration and secret missions inside a school setting being quite intriguing. However, the execution falls short in many aspects.

First, the school is supposed to be a prestigious, well-known institution, yet it doesn’t feel like one. There are only a few teachers shown, and the environment doesn’t give off the vibe of a big or elite campus. It feels oddly empty and underdeveloped.

Second, the NIS (National Intelligence Service) aspect is also disappointing. It's expected to be a high-tech, well-funded, and high-caliber agency. But the headquarters looks like an old, outdated building. Their equipment and operations seem low-budget and unimpressive, which really takes away from the realism and thrill the story could have offered.

Overall, the concept is great, but the details and world-building needed more effort to be convincing.

Faxey May 07 2025 5:47 pm The movie was amazing and fun to watch! Kudos to the Crew, directors, producers and everyone who assisted in making this movie !

Fai Apr 26 2025 1:48 am Worth my time. I sit through the show.

Thunbs up for the villian acting, she’s amazing!

Fried Chicken Apr 24 2025 6:37 pm Serious, the love-line really should not be added in this drama. Not every drama will work for romance including this. I more interested with Yena and An Yujeong friendship though. The romance kill this for me

eak Apr 18 2025 5:11 pm I wish there were more romance in it, the chemistry of ML and FL is just ! I need more! We don't even get a proper kissing scene. Overall this is such a fun drama, it's been a while i had a good laugh watching a show. I just finished rewatching it because of how much i like it!

Taylor Apr 16 2025 11:11 am I thought it was all thriller and mystery like Class of Lies but it turned out the comedy hits the spot ! I love everything about this series bc every episode got me excited for the next one. This is also my first Seo Kang Joon drama and I'm mesmerized by his charm, eyes and smile like he's a whole visual and great acting. I would demand a Season 2 at this point bc I'm gonna miss it so bad!

Indonesian Viewers Apr 13 2025 8:38 pm Jin Ki Joo was the main reason I decided to watch UHS. Surprisingly, this drama filled by cool actors. Every role has their own bold character, so you will remember each of them. in UHS I really enjoy the acting of Seo Kang Joon, Kim Shin Rock, and also The NIS Triplets (haha). This drama is very entertaining and fun to watch, yet you can get crime mystery to think and discuss with your friend. Too bad it's only have 12 eps to air and less promotions. UHS might not reach the rating target from tv station, but if you're doing media monitoring in social media, I'm pretty sure that UHS deserve more attention. I wish all UHS cast & crew will make a long friendship after filming, since we can feel the warmth of their teamwork. Love from Indonesia.

Stella Apr 10 2025 6:34 am Wow!! Great drama kudos to all of you, super cool SEO Kang Joon looks cute in these drama great job Jin ki Joo deserve the praise

Loverett Apr 10 2025 5:12 am Comments derived from viewer's point shown both good & bad. Ultimately it bears unpleasantness on the female lead especially when the male lead is an eye candy crush (out of jealousy or whatever). Pardon for this unintentional feedback which is not meant for attack on any rival commentators.

Undercover High School cast of actors, All did a great job in their own perspective roles including those working behind the scenes workers. Respect to one & all for your hardwork.

Seo Kang Joon has matured into a fine actor. His charismatic positive demeanour in this drama brought out the best of him. He has shown much devotion towards his comeback drama. He is the torch of this drama. Hope to see more of his work in the future.

Jin Ki Joo is a low key actress but without doubt a very good actress. She had shown in her past drama that she could carry any role presented to her. Her persona images come from what is required by the directors & scripts which she has faithfully performed. So to describe her characters in any drama as annoying is truly unfair. Please spare a thought for her, she deserve better comments. The little romance in the drama shone & overcome the male lead loneliness in his struggle. She will excel in her acting careers in the long running years ahead.

Kim Shin Rok is a flawless & versatile actress. She nailed her role as a villain that one either likes or hates her, her on screen appearance cannot be erased. She is an important part in the drama plot.

Undercover High School on the light side is fun, entertaining & enjoyable drama to watch ease one's tension from pressure.

Bidding adieu adios .. peace ✌️

Loverett Apr 10 2025 4:26 am Undercover High School is freaking enjoyable drama and looking forward for season two hopefully.

Bi-ah Apr 05 2025 10:49 am The first 6 episodes looked promising, the story line, the humour, the horror, the action, everything..But, it went downhill from there when the story entered the serious part, when it connected with the missing Dad story and then they also tried to incorporate romance into it. The story begins to show so many loopholes. The NIS team that was initially the main actors, became background actors. The story that started with a solid NIS team became a useless incapable team. The teacher, Oh Su-ah becomes the main actor although her role in the storyline is unclear. How come a teacher beats the NIS agents when it comes to bravery and fighting?? How come NIS agents are all so incapable of doing martial arts (except Jong Hae-song). How come the main villain Seo Myeong-ju is that powerful and there's no one could stop her till the end..Even when she was finally arrested, there was not anything spectacular about it, just happened to get the USB with voice recording. Like you wait till the end to beat her, but it was only with such a simple thing??

There are so many loopholes in the story. I think they are trying too hard to incorporate so many genres and aspects into the series that they didn't focus on building the main narrative well. They should've focused on action-comedy genre and leave the romance out of it. Also, I think using the missing Dad narrative as a way to build the emotion of the main character is a blinder. The character of Jeong Hae-song was already good as it is without needing this unnecessary background story, thanks to Seo Kang-Joon's high quality acting. I don't feel a great chemistry between SKJ and JKJ either. I don't think there should be romance in the storyline, the character of Oh Su-ah is so unnecessary, and the link to the past as a childhood friend. Too many unnecessary things they ruined an otherwise a great action comedy series.

As much as I love SKJ and admire his acting skill, I think this drama is just OK or maybe even a NO. It is too ambitious in trying to achieve so many things by incorporating so many genres and aspects altogether, but ended up failing to knit a nice story which should be the backbone of a drama.

Olya_1004 Apr 03 2025 11:31 pm I wanted to watch this drama mostly for the storyline,don't really care for Seo Kang Jun and don't know the FL actress that well. I would say that the drama can be silly at times but it's meant to be a comedy so don't take some of the scenes too seriously or it would get annoying. Also yes FL was a bit annoying in the first couple of episodes but I would say she got much better later on.

I would say that the highlight of the show was definitely our villainess Kim Shin Rok. I am not really familiar with her and haven't seen her before (at least from what I remember) but damn,her acting was on point. She portrayed a woman descending into madness quite well and it's rare to see women play such great vilians in Kdramas (I don't consider mean grannies into this category). If anything,I would recommend watching it just to see her performance but overall the drama wasn't bad,I would give it 8/10.

John Apr 03 2025 5:27 pm The FL Jin KiJoo is so freaking annoying

rexy Apr 03 2025 1:11 pm 100% recommended! This Drama has a little bit of everything. I love the chemistry between the leads SKJ and JKJ. Everyone's acting is on point. JKJ is underrated I hope people can see how amazing she is as an actress. Hope she can get more good projects under the new management.

waeyo Apr 02 2025 7:08 am Is it just me or Kim Shin Rok is oozing with appeal? I mean she is not on SHK/KTH level beauty wise but the she portrays her characters/roles in such a charismatic way thay she tends to be an eye catcher.

Fanster Apr 01 2025 1:29 am the series is literally stephen chow's fight back to school.

Jillibean Mar 31 2025 3:10 pm I watched the first episode and thought the plot ridiculous. Does it get better?

Meowster Mar 31 2025 2:44 am Kim shin rok plays such a great villain! Hope to see her in more lead roles

Ramo Mar 30 2025 11:45 am This drama is underrated, the acting here is fantastic from the protagonist to the antagonist.

Angelica Mar 30 2025 10:33 am Its do nice 10/10 for meee?

Vero Mar 30 2025 8:58 am Seo Kang-Joon's acting skills are superb. He is very accomplished. I was laughing that "he" was being taught how to play piano in the show. He should have his own movie franchise.

Jin Ki-Joo is also a wonderful actress, with the comedic timing of a seasoned pro. I liked her so much in "Now it's Showtime" and loved her in UHS. She has now worked with the two main love interests of "Cheese in the Trap", which I recommend for Seo Kang-Joon's acting alone.

Thank you to all who worked on UHS. It's my top show.

Vero Mar 30 2025 8:46 am One of the best shows this year. Loved the "Les choristes" style send off.

Yungs Mar 30 2025 7:04 am @Gabi the title song is Promise by Be feat. Han Sungho. It is OST for movie "Romance" (2002)

Gabi Mar 30 2025 3:12 am Hi, anybody knows the name of the song in episode 11, at 29:00 ? thanks!

Seo Yoon Mar 30 2025 2:41 am I will recommend this for sure! I will miss this so much. I wish I could watch Undercover Highschool for the first time again.<3

Anonymous_88 Mar 30 2025 1:07 am I didn't know that the Last episode was on March 29, because I finished it within 2days only haha Though I have already seen episode 1 sometime ago... Congrats and kudos !!!!!

Ben Mar 29 2025 10:58 pm I'm with Zai on this one..anyone know the significance of Lee Kyung chan...is he an actor or writer or part of the production staff..?

zai Mar 29 2025 9:09 pm at the end of the final ep, there was a condolence message for a person named lee kyung chan. does anyone know who that is? i checked the cast list, nd the name doesn't pop up?

dmilly Mar 29 2025 5:10 am loveee this series! Never thought i will actually be hooked to the drama. Please please have Season 2 with the same cast members !

Myeong Joo Mar 28 2025 11:55 am I hope hae song dead and the gold can be found

Jia ?? Mar 28 2025 10:59 am I love this K-drama! I can't wait for Episode 12. We Need Season 2! Happy ending pleaseeee!

rochelle Mar 26 2025 12:12 pm I love this series. I'm glad that I watched this. I don't get bored. Every episode is so exciting it gives you a roller coaster emotions. I love the the main lead that hae seong aaa so handsome. the chemistry between the main leads are so satisfying. I love this overall. Please give us a happy ending juseyo. Thank youuu! aaaaa

an Mar 25 2025 6:09 pm Done watching eps 10 . So sad episode after watch hae seong sad . We Need Season 2 . We need the continue of the dramaaa

Jae Mar 25 2025 11:41 am March 26, 2025 // 12:42 AM // Wed.

Done watching the latest episode. (Ep. 10) I cried when he saw his Dad. Imagine he's (Dad) been through a lot..

Last 2 eps. next week. I am going to miss them. ?

G2 Mar 24 2025 2:24 pm We need a Season 2. I really like series. The actors did a great job. I really like the portrayal of Kim Shin Rok as the chairwoman. She exudes a different take and a different essence of a villain. She perfectly portrayed a passive-aggressive villain that we could only see few times in k dramas. I love that this series offer a blend of laughter, mystery, and action infused in a rather rom-com type of drama. Kudos to the writer and the director.

Abi Mar 23 2025 7:10 am I have been skipping dramas lately and been a long time since i watched. I am so happy I found this. Soooooo hilarious! I love it so much. I hope to find more series thats freaking funny such as this! The leads act sooo well too! Drama, comedy, horror. I am excited to finish it!

dit Mar 23 2025 12:03 am This is my favorite kdrama so far! I love the chemistry between the main lead :)

Larisa Mar 22 2025 2:07 pm This k-drama is pure gold!!!!! I haven’t seen a drama like this in the past months

I adore it! Worth watching!

Kik Mar 22 2025 11:44 am Seo Kang Joon’s best work yet. He nailed every scene that is comedy, romantic, suspense, action, emotional, and devastation.

Ashleigh Mar 19 2025 2:50 am Episode 4 ending is gold.. It's been awhile since a rom com drama made me laugh like this. Scene to scene is perfecf, did not expect that to happen lol

Jillibean Mar 15 2025 6:12 pm Seo Kang Joon is one of my top favorites. I'll watch anything he's in. :) I missed him when he was away for his military service.

Roo Mar 15 2025 11:57 am Park Tae Soo looks seriously old for a high schooler, he could go undercover as a headmaster :')

Bongjo Mar 14 2025 7:06 pm su ah mom is NIS agent she is behind the missing hae song dad

Mythoughts78 Mar 13 2025 4:39 pm IMO, it’s refreshing. Like both ML and FL. Cute together, and great acting on all ends of drama. 6eps in, storyline n writing is Very Excellent.

Luna Mar 11 2025 2:45 pm The drama itself is really entertaining. The comedy is on point. I found myself laughing every episode.

Seo Kang Joon is so hot. He portrays his character very well. Even the supporting casts are great!

However, the acting of FL is a bit annoying. I highly agree with the other comments here. Romance is unnecessary imo. This drama can go on even without that.

natty Mar 11 2025 5:02 am lemme guess, Ahn Seok-Ho is one of the villain, just my two cents

JayKay Mar 09 2025 10:53 pm Really enjoying this drama; however the FL is quite annoying. I hope her character develops and grows after epi 6. Annoying, loud and unrealistic. What teacher intrudes on a students home life and brings soup to them? Not sure is this drama even needs a romcom storyline. Besides that, it’s so far very entertaining. SKJ is fire!

K Mar 09 2025 4:48 am sorry but the fl pmo!

young yi Mar 07 2025 9:54 pm eps 5 wtf bro the ending

Grasshopper Mar 07 2025 1:57 pm The end of ep 4 is too freaking hilarious, can't wait next, hopefully ends great

Mary Joy Mar 06 2025 11:03 am Good drama, quit interesting. Hoping for faster uploaded episodes? can't wait to see the upcoming release of episodes

Jjo Mar 05 2025 12:41 am JkJ character is so annoying and immature. I feel the drama can do so much better even without the unnecessary loveline.

elysian Mar 04 2025 6:35 pm this kdrama is so entertaining, every episodes are fun to watch. waiting for next episode ?

Bench Mar 03 2025 1:21 am Quite interesting. I just have one issue though. If the childhood friend was Hae Song, then shouldn't the eye color match? Or maybe eye color changes overtime. Just a minor production concern though.

KL Mar 02 2025 9:59 pm Great drama! Forgot how gorgeous Seo Kang Joon is. He’s so manly post military. Haha. Great pace and keeps viewers interested. Cant complain!

Keisya Mar 02 2025 7:23 am I am very waiting for the next episode because in episode 4 is very entertaining especially at the end of the episode .

Yaz Mar 01 2025 10:36 pm Love this drama, so funny. Love seo kang joon

Sara Mar 01 2025 11:25 am Kdramas really love that they should have been childhood friends, first love, or even lover in previous lifetime don't they?

Arian Feb 25 2025 12:51 pm Honestly, i love his acting but he's too old to play the character of a student... i just don't buy it.

Kim Esther Feb 25 2025 9:51 am Love this episodes please keep up the hard work. I'm so in love with this drama because, one of my favorite actor is inside.. can't wait for the upcoming episodes.

Ren Feb 24 2025 5:15 am Quite interesting and not boring at all. Love Seo Kang Joon.

Kim Feb 23 2025 12:10 pm I feel so old when writing this but this drama reminds me to HK star Chow Sing Chi's hit movie "Fight Back To School". Just 2 episodes but I think I'm gonna love this drama.

Happy98 Feb 23 2025 7:34 am This drama has a very big chance of success, some scenes felt good but felt like they could have been better. What kind of Students council do you want? They are neither fully bastard or good. The N.I.S? They're not really excellent on their job as mentioned by themselves. Up to the last episode, the other actors besides MC are really just like a cheerleading squad to liven things up, not really having any effect on the storyline. I will keep watching to see how it develops :)

Jenike Feb 22 2025 3:38 am I was really looking forward to watching this drama, because I like the lead actors acting skills and the mystery of plotting and uncovering. The thing that made my excitement dropped after watching the 1st episode. What are they trying to emphasize whenever the high school student “ Lee Dong Min” appears they put an emphasis on the name and the appearance of the character. The other students names are not being emphasized like that character’s name “ Lee Dong Min”…They know very well with what they’re busy with and I don’t like it so due to this…I’m not interested in continue watching this series.

lee catnip Feb 22 2025 2:03 am This drama is promising. But the twists: like his boss' daughter also studies in the that school where he'll be working as an undercover, might mess things up. Same with the brat boys in the resto. There are people who might recognize him though.

Rin Feb 22 2025 12:31 am Watched the 1st episode and it was good. The story line is okay. It has humor and not too serious. I like both main actors and their acting so It’s fun to watch. This is my first drama in 2025. I wish the plot for next episodes still entertaining and not boring. Gonna wait for other episodes!

Shaima Feb 07 2025 1:45 pm I can't wait, february 21 please comeeeeee!!!

SKJ and JKJ fan Feb 04 2025 7:42 am I'm so excited to see SKJ back and with JKJ in one movie, my both favorite stars, I'm super excited!

Paul Jan 29 2025 2:36 pm Sound like Fight Back to School. LOL can't wait to see how it goes

PANDORA Jan 25 2025 10:13 pm @Lily Main Hoon Na was set in college not a high school.

Yang yang Jan 24 2025 7:19 pm Undercover? How old is he to look like a high schooler.

Lily Jan 24 2025 5:24 am When I first saw the plot, I suddenly remembered the Hindi movie "Main Hoon Na," in which an officer also goes undercover at a high school. Anyway, I was looking forward to seeing Seo Kang-joon's next project, and here comes his new project with my favorite Jin Ki-joo ?

CiciOhMy Jan 03 2025 3:58 pm What? I was excited about Seon Kang Joon's first project after military but, I don't know about this one. Maybe I'll watch the next one.

A Fan Nov 04 2024 10:02 pm All I can say is: I cannot wait!!!!! Ahhhhhh!! February hurry up!

CBR Oct 20 2024 1:59 pm High school really? Everything sucks nowadays. We don't get any good content to watch. As usual we're going to get the cringe romance. Creativity died with man to man

.... Oct 04 2024 9:59 pm the cast is great but the plot?? why are they forcing them to have romance between student and teacher? The plot is so terrible

Errra Oct 04 2024 8:21 pm Why becones high school student? Can't this story goes to become university student? It will more make sense considering the actor's age. The body figure between boys and men are different though maybe the face look young. Why always high school? But can't hardly wait to see Seo Kang joon in his new project after finishing his military service. Miss him so much!

Sid Aug 25 2024 3:58 pm What? He goes undercover as a student, you can't be serious. Like he couldn't go undercover as a teacher which would make more sense.

Adel Jun 20 2024 12:33 am Seo kang joon & Jin kijoo? Love them both.Amazing pairing,i cant wait!!!

Anney Jun 18 2024 9:10 pm Looking forward to this! I love kang joon!

MsBit Jun 18 2024 3:16 am Looking forward to this. This is a beautiful series, I bet.

aleput Jun 17 2024 9:12 pm whatever jin kijoo is in, im in

Jew Jun 17 2024 8:20 pm Oh, i love this pairing. Looking forward to it.?

External Links

Official Website

@@ Line 64: / Line 64: @@
 ===Byeongmun High School Student Council===
 {{CastPictures6-5
-|1picture=File:Undercover High School-Kim Min-Ju.jpg
+|1picture=File:Undercover High School-Kim Min-Ju1.jpg
 |1name=Kim Min-Ju (Iz*One){{!}}Kim Min-Ju
 |1charactername=Lee Ye-Na
@@ Line 77: / Line 77: @@
 |4charactername=Han Seung-Jae
 |5picture=File:Undercover High School-Yoon Chae-Bin.jpg
-|5name=Yoon Chae-Bin (actress){{!}}Yoon Chae-Bin
+|5name=Yoon Chae-Bin (2001){{!}}Yoon Chae-Bin
 |5charactername=Yoon Chae-Rin
 |6picture=File:Undercover High School-Kim Sun-Min.jpg
@@ Line 85: / Line 85: @@
 ===Byeongmun High School Students===
-{{CastPictures6-5
+{{CastPictures12
-|1picture=File:Undercover High School-Shin Joon-Hang.jpg
+|1picture=File:Undercover High School-Shin Joon Hang.jpg
 |1name=Shin Joon-Hang
 |1charactername=Lee Dong Min
@@ Line 101: / Line 101: @@
 |5name=Kim Seung-Beom (2002){{!}}Kim Seung-Beom
 |5charactername=Kim Ho-Jin
-|6picture=File:Undercover High School-Yang Ji-Hun.jpg
+|6picture=File:Undercover High School-Chae-Yoon.jpg
-|6name=Yang Ji-Hun (2000){{!}}Yang Ji-Hun
+|6name=Chae Yoon (2000){{!}}Chae Yoon
-|6charactername=Heo Jun-Yeong
+|6charactername=Kang Gi-Yeong
+|7picture=File:Undercover High School-Yang Ji-Hun.jpg
+|7name=Yang Ji-Hun (2000){{!}}Yang Ji-Hun
+|7charactername=Heo Jun-Yeong
+|8picture=File:Undercover High School-Keum Ye-Sol.jpg
+|8name=Keum Ye-Sol (2000){{!}}Keum Ye-Sol
+|8charactername=Kang Hee-Jin
+|9picture=File:Undercover High School-Mo Yoon-Hee1.jpg
+|9name=Mo Yoon-Hee (2005){{!}}Mo Yoon-Hee
+|9charactername=Han Tae-Yi
+|10picture=File:Undercover High School-Hyo-Dan.jpg
+|10name=Hyo Dan (1999){{!}}Hyo Dan
+|10charactername=Choi Hyo-Joo
+|11picture=File:Undercover High School-Kang Soo-Min.jpg
+|11name=Kang Soo-Min (actress){{!}}Kang Soo-Min
+|11charactername=Do Eun-Jung
+|12picture=File:Undercover High School-Kim Ye-Joon.jpg
+|12name=Kim Ye-Joon (actor){{!}}Kim Ye-Joon
+|12charactername=Cheon Sang-Hoon
 }}
@@ Line 174: / Line 192: @@
 |2name=Yu Ji-Wan (2015){{!}}Yu Ji-Wan
 |2charactername=Jung Hae-Seong (child)
+}}
+===Ahn Seok-Ho & Ahn Yoo-Jung's Family===
+{{CastPictures1
+|1picture=File:Undercover High School-Kim Soo-Jin.jpg
+|1name=Kim Soo-Jin (1974){{!}}Kim Soo-Jin
+|1charactername=Jang Man-Ok
 }}
@@ Line 192: / Line 217: @@
 |1charactername=Park Min-Ji
 }}
-{{CastPictures17
+{{CastPictures21
 |1picture=File:Undercover High School-Li Yongqun.jpg
 |1name=Li Yongqun
 |1charactername=blackmarket buyer (ep.1)
-|2picture=File:Undercover High School-Kyung Ki-Hyun.jpg
+|2picture=File:Undercover High School-Chae Hoon1.jpg
-|2name=Kyung Ki-Hyun (actor){{!}}Kyung Ki-Hyun
+|2name=Chae Hoon (1997){{!}}Chae Hoon
 |2charactername=restaurant hoodlum (ep.1)
-|3picture=File:Undercover High School-Shin Dam-Soo.jpg
+|3picture=File:Undercover High School-Kyung Ki-Hyun.jpg
-|3name=Shin Dam-Soo
+|3name=Kyung Ki-Hyun (actor){{!}}Kyung Ki-Hyun
-|3charactername=Assemblyman Park Min-Cheol (ep.1,3)
+|3charactername=restaurant hoodlum (ep.1)
-|4picture=File:Undercover High School-Shin Yun-Sook1.jpg
+|4picture=File:Undercover High School-Shin Dam-Soo.jpg
-|4name=Shin Yun-Sook (1952){{!}}Shin Yun-Sook
+|4name=Shin Dam-Soo
-|4charactername=Choi Bok-Sun (ep.2-3)
+|4charactername=Assemblyman Park Min-Cheol (ep.1,3)
-|5picture=File:Undercover High School-Lee Bum-Chan.jpg
+|5picture=File:Undercover High School-Shin Yun-Sook1.jpg
-|5name=Lee Bum-Chan (actor){{!}}Lee Bum-Chan
+|5name=Shin Yun-Sook (1952){{!}}Shin Yun-Sook
-|5charactername=Lee Ye-Na's driver (ep.3,5)
+|5charactername=Choi Bok-Sun (ep.2-3)
-|6picture=File:Undercover High School-Yong-Jin.jpg
+|6picture=File:Undercover High School-Lee Bum-Chan.jpg
-|6name=Yong-Jin (actor){{!}}Yong-Jin
+|6name=Lee Bum-Chan (actor){{!}}Lee Bum-Chan
-|6charactername=detective (ep.3)
+|6charactername=Lee Ye-Na's driver (ep.3,5)
-|7picture=File:Undercover High School-Choi Kyung-Sik.jpg
+|7picture=File:Undercover High School-Yong-Jin.jpg
-|7name=Choi Kyung-Sik (1991){{!}}Choi Kyung-Sik
+|7name=Yong-Jin (actor){{!}}Yong-Jin
 |7charactername=detective (ep.3)
-|8picture=File:Undercover High School-Baek Kil-Sung.jpg
+|8picture=File:Undercover High School-Choi Kyung-Sik.jpg
-|8name=Baek Kil-Sung (actor){{!}}Baek Kil-Sung
+|8name=Choi Kyung-Sik (1991){{!}}Choi Kyung-Sik
-|8charactername=Kang Sung-Woo's dad (ep.3)
+|8charactername=detective (ep.3)
-|9picture=File:Undercover High School-Lee Dong-Gi.jpg
+|9picture=File:Undercover High School-Baek Kil-Sung.jpg
-|9name=Lee Dong-Gi (1996){{!}}Lee Dong-Gi
+|9name=Baek Kil-Sung (actor){{!}}Baek Kil-Sung
-|9charactername=Kang Sung-Woo (ep.3)
+|9charactername=Kang Sung-Woo's dad (ep.3)
-|10picture=File:Undercover High School-Park Jung-Eon.jpg
+|10picture=File:Undercover High School-Lee Dong-Gi.jpg
-|10name=Park Jung-Eon (1979){{!}}Park Jung-Eon
+|10name=Lee Dong-Gi (1996){{!}}Lee Dong-Gi
-|10charactername=student's mom (ep.3)
+|10charactername=Kang Sung-Woo (ep.3)
-|11picture=File:Undercover High School-Ahn Nae Sang.jpg
+|11picture=File:Undercover High School-Park Jung-Eon.jpg
-|11name=Ahn Nae-Sang
+|11name=Park Jung-Eon (1979){{!}}Park Jung-Eon
-|11charactername=neighborhood resident (ep.4)
+|11charactername=student's mom (ep.3)
-|12picture=File:Undercover High School-Kwon Tae-Won.jpg
+|12picture=File:Undercover High School-Ahn Nae Sang.jpg
-|12name=Kwon Tae-Won
+|12name=Ahn Nae-Sang
-|12charactername=Chief Editor Yoon (ep.5)
+|12charactername=neighborhood resident (ep.4)
-|13picture=File:Undercover High School-Joo Suk-Tae.jpg
+|13picture=File:Undercover High School-Kwon Tae-Won.jpg
-|13name=Joo Suk-Tae
+|13name=Kwon Tae-Won
-|13charactername=Han Seung-Jae's dad (ep.7-8)
+|13charactername=Chief Editor Yoon (ep.5)
-|14picture=File:Undercover High School-Yoo Dam Yeon.jpg
+|14picture=File:Undercover High School-Joo Suk-Tae.jpg
-|14name=Yoo Dam-Yeon (1976){{!}}Yoo Dam-Yeon
+|14name=Joo Suk-Tae
-|14charactername=Ms. Do (ep.7-8)
+|14charactername=Han Seung-Jae's dad (ep.7-8)
-|15picture=File:Undercover High School-Kim Dae-Geun.jpeg
+|15picture=File:Undercover High School-Yoo Dam Yeon.jpg
-|15name=Kim Dae-Geun (1990){{!}}Kim Dae-Geun
+|15name=Yoo Dam-Yeon (1976){{!}}Yoo Dam-Yeon
-|15charactername=gang member (ep.10)
+|15charactername=Ms. Do (ep.7-8)
-|16picture=File:Undercover High School-Jung Eui-Wook.jpg
+|16picture=File:Undercover High School-Kim Dae-Geun.jpeg
-|16name=Jung Eui-Wook
+|16name=Kim Dae-Geun (1990){{!}}Kim Dae-Geun
-|16charactername=Detective Cho Sang-Cheol (ep.11-12)
+|16charactername=gang member (ep.10)
-|17picture=File:Undercover High School-Han Chae-Bin.jpg
+|17picture=File:Undercover High School-Jung Eui-Wook.jpg
-|17name=Han Chae-Bin (1986){{!}}Han Chae-Bin
+|17name=Jung Eui-Wook
-|17charactername=hotel receptionist (ep.11)
+|17charactername=Detective Cho Sang-Cheol (ep.11-12)
+|18picture=File:Undercover High School-Han Chae-Bin.jpg
+|18name=Han Chae-Bin (1986){{!}}Han Chae-Bin
+|18charactername=hotel receptionist (ep.11)
+|19picture=File:Undercover High School-Lee Dong-Soo.jpg
+|19name=Lee Dong-Soo (1975){{!}}Lee Dong-Soo
+|19charactername=foundation executive (ep.12)
+|20picture=File:Undercover High School-Ma Jung-Pil.jpg
+|20name=Ma Jung-Pil (1976){{!}}Ma Jung-Pil
+|20charactername=foundation executive (ep.12)
+|21picture=File:Undercover High School-Yun Ki-Chang.jpg
+|21name=Yun Ki-Chang (1981){{!}}Yun Ki-Chang
+|21charactername=prosecutor (ep.12)
 }}
 '''Additional Cast Members:'''
 * [[Ko Kyung-Man (actor)|Ko Kyung-Man]] - Minister of Education (ep.1)
 * [[Ahn Chan-Woong (1986)|Ahn Chan-Woong]] - Byeongmun High School control room staff (ep.7)
+* [[Park Jae-Wan (1968)|Park Jae-Wan]] - judge (ep.12)
 ==Trailers==
@@ Line 287: / Line 325: @@
 Source: [http://www.agbnielsen.co.kr/ AGB Nielson]
+==Awards==
+* [[2025 MBC Drama Awards]] - December 30, 2025
+** '''Grand Prize''' ([[Seo Kang-Joon]])
+** '''Best Actress''' ([[Jin Ki-Joo]])
+** '''Best Drama'''
+** '''Best Supporting Actress''' ([[Kim Shin-Rok]])
 ==Comments==

Difference between revisions of "Undercover High School"

Latest revision as of 09:05, 30 December 2025

Contents

User Rating

Profile

Plot Synopsis by AsianWiki Staff ©

Notes

Cast

N.I.S.

Byeongmun High School Student Council

Byeongmun High School Students

Byeongmun High School Employees

Byeongmun High School Ghost Stories Students

Oh Soo-A's Family

Jung Hae-Seong's Family

Ahn Seok-Ho & Ahn Yoo-Jung's Family

Gambling Ring

Others

Trailers

Episode Ratings

Awards

Comments

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Comments

External Links