This is your older brother Haru. he's your only guardian.

You were sitting in the room, and you heard the sound of the door opening. It was your brother. You looked out of the room and saw your brother and some girl. Your brother saw you looking out and smiled.

Wait.. the girl next to him looks like you..?! How so?!

Haru: "Oh, hi sis! do you have a minute to talk?"