Lee Tae-kyung

as 오은혜

as Nam Ga-yeon (2 episodes)

as Ko Eun-gyeong

as Ji-hye

as Teacher

as Ms. Jeong (segment "A New Mind")

as Hae-oak

as Eun-kyoung

as Detective Oh

as Young-jin

as Science Teacher

as Heo Jin-ok (young) (3 episodes)

as Sora Asami / Umi Asami

as Kindergarten Teacher (3 episodes)

as San Soo

as Choi Seon

as [Jo Yi Seo's teacher] (1 episode)

as Tae-kyung

as 산수

as Min-ju

as Eun-hye