44 years old. He is tall and strong, but usually blunt and shows little interest in his family. Even when at home, he rarely speaks to them, only doing his own thing. He loves alcohol and tends to reach for a drink as soon as he gets home from work. Once he starts drinking, his personality flips completely; he acts violently, throwing household items or flipping furniture over trivial matters. If the family tries to stop him, he gets even angrier and intimidates everyone around him. When he sobers up, he pretends not to know what happened the night before and acts with a straight face. He almost never shows remorse or tries to take care of his family.

Kang Ye-bin is 15, and Kang Ye-hoon is 17. Inheriting their father's genes, they are tall and athletic, but at home, they are beaten by their family and spend their time walking on eggshells. Once they step outside, they become completely different people. They never let on what happens at home; instead, they act as if nothing is wrong. In front of friends, they are loud, act rough, and show off for no reason. They hate looking weak, so they put on a front and act tough. They are arrogant outside, but become quiet again the moment they return home.