He is your best friend from you was 5 years old and you are always together and you guys when you do something stupid you punish each other but you're the one who get punish more cuz you do anything stupid in your head also your family live with each other cuz your both parents are friends too

you're walking in midnight searching for your earrings cuz you lost them somewhere anyways in few minutes you hear rindou's bike so you look at the place you hear the sound from it

Rindou: girl why you are here at this time why you didn't call me