Seo Kang Jun Stands Up Against The School Bully 💪 | Undercover High School EP2 | KOCOWA+

How Well Do Seo Kang Joon and Jin Ki Joo Know Each Other? 😍 | Viu Original, Undercover High School

A House Visit Takes An Unexpected Turn... | Undercover High School EP4 | KOCOWA+

5 Years Later, Jin Ki Joo & Seo Kang Jun Are Engaged! 💍 | Undercover High School EP12 | KOCOWA+

Seo Kang Jun Defends Jin Ki Joo From Aggressive Customers | Undercover High School EP1 | KOCOWA+

[Trailer] Viu Original, Undercover High School | Coming to Viu 21 Feb!

Seo Kang Jun Discovers The Ugly Truth At Dinner | Undercover High School EP5 | KOCOWA+

Seo Kang Jun Keeps Feeling His Heart Race Around Jin Ki Joo 🤭 | Undercover High School EP7 | KOCOWA+

[4K] Undercover High School Press Conference | MBC Fri-Sat Drama

Undercover High School | Official Trailer | Seo Kang Joon | Jin Ki Joo {ENG SUB}

Jin Ki Joo Is Shocked To Discover Their Past Connection | Undercover High School EP8 | KOCOWA+

Seo Kang Jun Confesses His Feelings To Jin Ki Joo | Undercover High School EP10 | KOCOWA+

Instead Of Finding The Gold, Seo Kang Jun Finds His Dad | Undercover High School EP10 | KOCOWA+

Seo Kang Jun Makes A Grand Entrance Before He's Expelled | Undercover High School EP3 | KOCOWA+

Seo Kang Jun Finds Jin Ki Joo Unconscious In His Home | Undercover High School EP9 | KOCOWA+

Jung Hae Seong - Undercover High School fmv

Operation Get Seo Kang Jun Into Student Council Starts Now! | Undercover High School EP4 | KOCOWA+