S01E06: Bungaeman
Jeon Gye-do's past is revealed. The NIS finds out information about Frank.
Previous Episode 
Season 1
Senior Year
S1E1 / 09 Aug 2023
Booyang: Family Support, Levitation
S1E2 / 09 Aug 2023
1+1
S1E3 / 09 Aug 2023
The Secret
S1E4 / 09 Aug 2023
Recall
S1E5 / 09 Aug 2023
Bungaeman
S1E6 / 09 Aug 2023
The Stranger
S1E7 / 09 Aug 2023
Black
S1E8 / 16 Aug 2023
Humanists
S1E9 / 16 Aug 2023
The Monster
S1E10 / 23 Aug 2023
Romanticist
S1E11 / 23 Aug 2023
Partners
S1E12 / 30 Aug 2023
Jang Ju-won
S1E13 / 30 Aug 2023
The Idiot
S1E14 / 06 Sep 2023
N.T.D.P.
S1E15 / 06 Sep 2023
The Man Between
S1E16 / 13 Sep 2023
Awakening
S1E17 / 13 Sep 2023
South and North
S1E18 / 20 Sep 2023
Final Battle
S1E19 / 20 Sep 2023
Graduation Day
S1E20 / 20 Sep 2023
Ryu Seung-ryong
Jang Ju-won
Han Hyo-joo
Lee Mi-hyun
Zo In-sung
Kim Doo-sik
Cha Tae-hyun
Jeon Gye-do
Ryoo Seung-bum
Frank
Kim Sung-kyun
Lee Jae-man
Kim Hie-won
Choi Il-hwan
