Adolescence Medley

Kwak Dong-yeon

as

Choi Jung Woo

Lee Se-young

as

Yang Ah Young

Kwak Jung-wook

as

Im Duk Won

Choi Tae-joon

as

Lee Yuk Ho

Park Jeong-min

as

Shin Young Bok

Bae Noo-ri

as

Jang Hyun Jin

Yoon Park

as

Lee Won Il

Baek Sung-hyun

as

adult Choi Jun...

Jeong In-gi

as

Jung Woo's fat...

Koh Soo-hee

as

Jung Woo's mot...

Oh Youn-hong

as

Ah Young's mot...

Jeong Soo-young

as

Homeroom Teach...

Yoon Joo-sang

as

Yuk Ho's grand...

Ahn Ji-hyun

as

Moon Soo Jung

Kim Dong-hee

as

Park Sung Tae