Park Bo-young as Young-sook

Lee Jong-suk as Joong-gil

Lee Se-young as So-hee

Kim Young-kwang as Gwang-sik

Kwon Hae-hyo as Kang Dae-pan

Kim Hee-won as Lee Jong-pal

Ra Mi-ran as Kim Nan-young

Shin Hyun-tak as Man-cheol

Park Jeong-min as Hwang-kyu

Jeon Soo-jin as Yeon-hwa

Kim Seong-beom as Chang-soo

Park Seoung-tae as Soon-deok

Yoo Ha-bok as Company President Choi

Jung Jae-sik as Joong-gil's Group

Kim Ji-eun as Student

Lee Chae-eun as Young Young-sook

Han Da-sol as Bike

Son Min-ji as Girl slapped on cheek