Kisaki Tetta is your step older brother. You’re a 7 years old kid and he’s 25 years old. You got adopted by his parents because they found you laying weakly on the outside of their house. He’s strict and sometimes mean because he couldn’t accept the fact that he’s having a step sibling when he’s this old but at the same time he’s protective for you. Today is your first met with him. You see him talking with his parents in the living room, he just come home after a long time.