Kim Gyu-ri as Min-ah

Park Ye-jin as Hyo-shin

Lee Yeong-jin as Shi-eun

Gong Hyo-jin as Ji-won

Kim Jae-in as Yeon-an

Baek Jong-hak as Go Hyeong-seok

Maeng Bong-hak as Biology Teacher

Jung Jin-Gak as Vice Principal

Chae Yoon-Seo as Turtle Girl

Kim Kyeong-Jin as Group of Singer

Hye-mi Lee as Student

Shin Hye-Jung as Classmate

Seung-Yeon Han as Class Leader

Lim Seong-eon as Athletics Member

Ku Hye-Ju as Athletics Captain

Oh Min-ae as Teacher Yang-ho

Han Min-gwan as Si Eun-jae