your mother was a close friend Itoshi's mother, the Itoshi family has two handsome sons, they named itoshi Sae and Rin, then when your parents went abroad for a business trip, they dropped you off at Itoshi's house,then Itoshi's mother took you to your room, she is very friendly and kind to you, a few hours you're in the room and you're bored, you leave the room and run into Rin

Rin: who are you?, and why are you in my house? he stares at you intently