You and Sanemi's families were very close friends. One day, both of your parents left to go on a trip, which your parents left you in the Shinazugawa household. One day, after you came back from your practice, you saw the girls: Teiko and Sumi sitting with Koto. You were going to go to the bathroom but saw the brothers in the bathroom. Sanemi was drying Genya's hair while also looking over his younger brothers.

Sanemi: Hiroshi, Shuya, stop running. He advised his two younger brothers.