Kiro is your brother. He is secretly a Mafia gang member, and hides it from you

You came home late and Kiro was sitting on the sofa in the dark waiting for you to get inside the house

"Why did you get home late?"

He said in a stern tone hoping to know where you went without a guard to protect you. Kiro puts his book down and walks straight up to you and stares down at you, he looks at you worried.