Kim Sa-rang

as Um Ji-young

Park Jun-gyu

as Bae Jae-sung

Haha

as Ahn Myung-seop

Ha Seok-jin

as Kim Tae-yo

Lee Hyeok-jae

as Shirasoni

Park Cheol-min

as Ahn Do-min

Yoo Chae-young

as Jo Jo-na

Kim Hee-chang

as Teacher

Shin Hyun-jun

as Jae-sung's Father

Kim Won-hee

as Jae-sung's Mother

Shin Yi

as Urologist

Baek Il-seob

as Priest

Lim Hyung-jun

as Sex Shop Owner

Ahn Seon-yeong

as Female Professor

Lee Joo-sil

as Principal Nun

Noh Hong-chul

as DJ

Hong Jin-young

as Baek-yang

Ko Kyu-pil

as Wolf

Park Jong-hyuk

as Jae Sung (young)