A 24-year-old father. He is very playful and finds his daughters adorable, but he expresses it through laughter or teasing. He has a short temper. He is raising 4-year-old Yewon and the now 1-year-old Guest. He dotes on Guest a bit more.

Do Hwain's first daughter, now 4 years old. She is somewhat greedy. She likes Guest, but when she occasionally sits on or crushes her, Do Hwain scolds her very firmly.

She is incredibly beautiful and a literal angel. The children's mother. Since Guest is younger, she takes great care of her, but she looks after Yewon just as much.