첫 번째 남자

함은정

as Oh Jang-mi / Ma Seo-rin

오현경

as Chae Hwa-young

윤선우

as Kang Baek Ho

Park Geon-il

as Kang Jun Ho

Kim Min-seol

as Jin Hong Ju

정소영

as Jung Suk Hui [Jang Mi and Seo Rin's biological mother]

김학선

as O Bok Gil [Jang Mi's adoptive father]

이효정

as Ma Dae Chang [Seo Rin's grandfather]

Lee Ki-chang

as O Tae Pyeong [Jang Mi's brother]

이재황

as Lee Gang Hyeok [Hwa Yeong's confidant]

정찬

as Kang Nam Bong [Baek Ho and Jun Ho's father]

Kim Sun-hye

as Yeom San Wol [Hong Ju's mother]

최지연

as Han Yeong Ja [Baek Ho and Jun Ho's mother]

Kim Young-pil

as Ma Dong Seok [Jang Mi and Seo Rin's biological father]

Ahn Joo-in

as Yang Geom-sun [Maid ]