Ong Seongwu

["Choi Jun Woo"]

Kim Hyang-gi

["Yoo Soo-bin"]

Shin Seung-ho

["Ma Hwi-young"]

Kang Ki-young

["Oh Han-kyeol"]

Kim Do-wan

["Jo Sang-hoon"]

Kim Sun-young

["Yoon Song-hee (Soo-bin's mother)"]

Shim I-yeong

["Lee Yeon-woo"]

Park Sung-geun

["Lee Gwan-yong (Vice-principal)"]

Yoo In-soo

["Yoo Pil-sang"]