Jin Ho-eun

Wi Hong-shin

Sim Gyu-ho

Kim Bong-ju: the principal oboist.

Kang Jae-ho (their son, student)

Byun Jeong-yeol

Sa Jung-gyeong, a bully who sexually assaulted Seon-ha when they were previously in the same photography club.

Seo Ji-wan's friend

Goo Joon-gyeom