Jung Gun-joo

Chun Hae-bum

Lee Hong-seok

Cheon Jun-hwa

Moon Tae-oh

Jung Yu-ha: a noble scholar who has a delicate personality that takes good care of the other person's feelings and fancies Dan-oh.

Actor

Ye-sool's ex-boyfriend #2 (Ep. 1)

Shin Gyeom

Choi Kang-eu-tteum, a junior at Ha-ri's workplace who initially made her embarrassed by calling her Auntie

Lee Do-hwa (Secret)

A physical education teacher