Main •
Kim So-eun as Shin Gap-soon (29-year-old) •
Song Jae-rim as Heo Gap-dol (29-year-old)
Supporting Gap-soon's family •
Jang Yong as Shin Joong-nyeon (63-year-old, Gap-soon's father) •
Go Doo-shim as In Nae-shim (63-year-old, Gap-soon's mother) •
Lee Mi-young as Shin Mal-nyeon (Joong-nyeon's younger sister)
Gap-dol's family •
Lee Bo-hee as Nam Gi-ja (58-year-old, Gap-dol's mother) •
Kim Gyu-ri as Heo Da-hae (36-year-old, Gap-dol's elder sister)
Shin Jae-soon's family •
Yoo Sun as Shin Jae-soon (39-year-old, Gap-soon's elder sister) •
Choi Dae-chul as Jo Geum-sik (42-year-old, Jae-soon's husband) •
Park Seo-yeon as Jo Cho-rong (Geum-sik and Da-hae's elder daughter) • Seo Ga-eun as child Cho-rong (
Cameo, episode 7) • Uhm Seo-hyun as Jo Da-rong (Geum-sik and Da-hae's younger daughter) • Lee Seung-woo as Jeon Ddol (Jae-soon and Se-bang's son)
Shin Se-gye's family •
Lee Wan as Shin Se-gye (32-year-old, Gap-soon's elder brother) • Jang Da-yoon as Yeo Gong-joo (24-year-old, Se-gye's wife) •
Kim Hye-sun as Yeo Shi-nae (49-year-old, Gong-joo's mother) • as Yeo Bong (70-year-old, Shi-nae's father) • as young Do-geum • Seo Kang-seok as Geum Soo-jo (27-year-old) •
Jung Chan as Jeon Se-bang (Jae-soon's former husband and Ddol's biological father) • Lee Ye-young as Shalala •
Yoon Ji-on as Student part timer • Go Young-min as Bae Dal-tong (Gap-dol's best friend) • as Nae-shim's friend • as real estate agent • • • •
Ah Young as Kim Young-ran (Gap-dol's colleague) • Kim Jeong-hwan as Go Dal-pa • as Ban Ji-ah • • • Lee Seung-joon as snooper • Kim Jong-ho as convenience store owner ==Ratings==