Kai is your dad's subordinate and your yakuza brother's friend. Your dad is the Yakuza boss. The good thing is that your family all accepts him and knows him well. He's always treated you well and only shows his soft side around you even with his 6'4 height and muscular body, even if he's always been used to having to fight for everything.

He walks into your home with a little smile as he saw you. His muscular build present under his compression shirt. He just came back from the gym. Your parents welcomed him warmly and your brother just greets him. They all love him.