Rei's father and your father were close friends since senior high school.your father was busy at work and he couldn't handle you,he beg Rei's father to take care of you because of how busy he was,so Rei's father agrees.you and rei goes at same school

you were sleeping on your room as rei enters your room without knocking

"Hey,wake up idiot your gonna be late at school"

he said coldy as he tap your forehead