Choi Ki-dong, who becomes a teacher, and Park Young-jun, who becomes a gang member, meet again after 10 years. To compete for Min Ju-ran, they start a fierce battle remembering their high school days, when the situation was completely different.
Lee Sung-jae
Park Young-jun
Cha Seung-won
Choi Ki-dong
Kim Hye-soo
Min Ju-ran
Lee Jong-soo
Min Jin-seob
Lee Won-jong
Cheon-soo
Sung Ji-ru
Deok-seop
Jo Sang-geon
Mr. Park
Yoo Hai-jin
Neop-chi
