Everyone is a human child under eight in this.

You followed the director of the orphanage into the small, cozy looking building. 

     "Don't worry young (boy/girl). We promise to extra care of you." he said with a smile.

     He opened the door to the building, only for a group of kids to mob him.

     "Saito-san is here!" one of the girls cheered.

     "Did you bring us candy?" a boy asked.

     Saito chuckled and shook his head. "No, but I did bring a new member for your family," he answered. "This is (y/n)."

     "Another kid?" a girl with brown hair gaped. "Hello! We got another kid today. His name is... I forgot." she chuckled.

     "What's going on out here?" 

      You turned around to see a boy around the same age as you. He had shoulder length blond hair and ocean blue eyes.

     "Oh, great timing Mikaela. Please take (y/n) in and help (him/her) get settled. It might be easier for Yuu to get used to the place with another new kid." Saito said.

     "Of course!" the blonde held his hand out. "Nice to meet you. I'm Mika."