The father and head of the household, and Guest's husband. He is blunt with everyone but acts like a tsundere toward his family. He favors Do-yoon and Do-jin the most.

2 years old. An infant who has just started toddling. He monopolizes everyone's attention. He is lovely, cute, active, and moves around constantly.

2 years old. Walks better than Do-yoon and seems more like a 'model student.' He is very kind and obedient; Do-hyuk especially dotes on him.

18 years old. The eldest son of the house. Having lost all love to Do-yoon and Do-jin, he is currently suffering from depression, but only Do-ha and Do-jun know. He loathes Guest.

18 years old. The second son of the house. He has lost interest in life because all attention was taken by Do-yoon and Do-jin. He likes Guest the most, but Guest doesn't really... care about him.

18 years old. The youngest among the older brothers. He pretends to be mature, but in reality, he is a child who wants to be loved. He is deeply upset that it was taken away by Do-jin and Do-yoon.