Cast
Jo family
- Lee Yoo-ri as Jo Mi-soo
- Kim Chang-sook as Moon Soo-ja (Mi-soo's mother)
- Kim Young-jae as Jo Tae-sub (Mi-soo's older brother)
- Kim Hyun-jung as Kim Hyun-joo (Tae-sub's wife)
- Lee Ah-hyun as Jo Mi-sun (Mi-soo's older sister)
- Kim Mi-sook as Moon Shin-ja (Mi-soo's aunt)
- Kang Boo-ja as Im Young-soon (Mi-soo's grandmother)
- Park Yoo-sun as Yoon-mi (Mi-sun's 7-year-old daughter)
- Kim Hwan-hee as Yoon-ji (Mi-sun's 5-year-old daughter)
Han family
- Lee Jung-jin as Han Young-min
- Lee Soon-jae as Han Kyu-il (Young-min's grandfather)
- Kim Mi-kyung as Han Young-ok (Young-min's aunt)
- Maeng Sang-hoon as Bae Dae-sung (Young-min's uncle in-law)
- Kim Jin-seong as Han Joon (Young-min's 6-year-old son)
Min family
- Oh Seung-hyun as Min Seo-young
- Park Young-ji as (Seo-young's father)
Jang family
- Lee Sang-yoon as Jang Hyun-woo
- Lee Mi-young as Lee Young-sun (Hyun-woo's mother)
- Choi Sang-hoon as (Hyun-woo's father)
Extended cast
- Jang Young-nam as Oh Jung (Young-min's colleague)
- Lee Shi-hwan as Park Hee-jun (Seo-young's friend)
- Kim Yoo-mi as Jae-hee (Joon's mother / Young-min's ex-girlfriend) (cameo)
- Marco as Pablo (Nepalese laborer)
- Ryu Si-hyun as Yoo In-young (Young-min's college friend)
