By Dramabeans
Jo Mi-ok
In Gyo-seok
Seo Hyun-ju's ex-boyfriend (Ep. 1, 2)
Butler Kim (Ep. 6)
Italian Table owner (Ep. 4)
Seo Hyun-ju's blind date (Ep. 3)
Seo Hyun-ju Joo Ye-rim as Seo Hyun-ju (child) Lee Chae-yoon as Seo Hyun-ju (teen)
Kim Da-eun
Yu-na (Ep. 1)
Oh Si-eon, webtoon writer
Han Seo-yoon
Hwang Ji-Woo (teen)
Seo Hyun-ju (child)
Hwang Ji-woo Jung Ji-hoon as Hwang Ji-woo (child) Bae In-hyuk as Hwang Ji-Woo (teen)
Kim Seon-hee
Kang Eun-jae
Seo Ho-joon, Hyun-ju's father and Park's adopted father
Park Do-gyeom Ha Yi-ahn as Park Do-gyeom (child)
Man at wedding (Ep. 1)
Jung Young-soon, Hyun-ju's mother and Park's adopted mother
You Gyo Girl, webtoon writer (Ep. 8, 10-11)
