Full cast of High School Return of a Gangster

Yoon Chan-young

Yi-heon/Kim Deuk-pal

8 episodes

Bong Jae-hyun

Choi Se-kyung

8 episodes

Won Tae-min

Kim Dong-soo

8 episodes

Lee Seo-jin

Kim Deuk-pal

8 episodes

Seo Tae-hwa

Choi Myung-hyun

8 episodes

Kim Se-won

Kim Yeon-ji

8 episodes

Joo Yoon-chan

Hong Jae-min

8 episodes

Lee Kyung-young

The Boss

8 episodes

Shin Min-jae

Mathematics Lecturer

8 episodes

Lee Hee-jin

Song Min-seo

8 episodes

Ko Dong-ok

Jong Cheol

8 episodes

Choi Ji-hye

Min-ji

8 episodes