Seo Su-bin

as Lee Jooin

Jang Hye-jin

as Kang Taesun

Kim Jeong-sik

as Jang Suho

Kang Chae-yun

as Gong Yura

Lee Jae-hee

as Lee Haein

Park Ji-yun

as Jang Noori

Kim Ye-chang

as Park Chanwoo

Go Min-si

as Han Mido

Lee Sang-hee

as Yang Boa

Lee Dae-yeon

as Oh Daehan

Kim Suk-hoon

as Lee Kidong

Baek Hyun-joo

as Lee Injoo

Byun Joong-hee

as Bae Yunja

Moon Hye-in

as Ms. Song

Kim Min-ji

as Kwon Somi

O Jung-won

as Hong Bomi

Kim Yun-jeong

as Pyo Dami

Choi Ga-in

as Choi Miyun

Son Seung-beom

as Son Beom

Lee Seo-i

as Lee Munha

Kim Ji-min

as Kim Jiyeon

Jung Eun-kyoung

as school principal

Kim Joon-bum

as dean of students

Kim Geu-lim

as lawyer

Kim Do-hyeong

as Suho's father

Lim Jae-hyeok

as Classmate