Gangster High— Full Cast

Jang Hee-jin

as Jung Soo-hee

Jung Kyung-ho

as Lee Sang-ho

Kim So-yeon

as Unknown

Kim Ye-ryeong

as Chang-bae's mother

Cho Jin-woong

as Jo Hong-kyu

Kim Hye-seong

as Choi Kyung-chul

Ko Kyu-pil

as Na Sang-shik

Yeon Je-wook

as Han Jong-seok

Lee Seok

as Kim Chang-bae