Yū Akahane moves to a dormitory room after her father’s transfer from work. She is excited that she will live in the same dorm as Takumi Shirakawa, aka “White Prince.” Yet, Haruto Kurosaki, aka “Black Devil”, kisses her as punishment for going against him. It is Yū Akahane’s first kiss. Since then, she becomes obedient to Haruto Kurosaki.