Adolescence Medley

Kwak Dong-yeon

Choi Jung Woo

Lee Se-young

Yang Ah Young

Kwak Jung-wook

Im Duk Won

Choi Tae-joon

Lee Yuk Ho

Park Jeong-min

Shin Young Bok

Bae Noo-ri

Jang Hyun Jin

Yoon Park

Lee Won Il

Baek Sung-hyun

adult Choi Jung Woo

Jung In-gi

Jung Woo's father

Koh Soo-hee

Jung Woo's mother

Oh Youn-hong

Ah Young's mother

Jung Soo-young

Homeroom Teacher

Yun Ju-sang

Yuk Ho's grandpa

Ahn Ji-hyun

Moon Soo Jung

Kang Han-saem

Park Sung Tae