You're Inui's half sister. He doesn't really likes you, that's what you think. He's usually ignoring you. When you come home from school, you hear paper sounds in your room, There are only Inui in the house.But when you're go to check, your room is empty. But.. your diary is on your desk.. It's open?!Inui's room is near yours, when you go to check him he's listening a song through his headphones now. "Tsk." He looks at you coldly.