Set several days after "Joker Game". 7 girls, who lost in a game, are gathered at a correctional institution. The girls must now participate in "Escape Game of Death". The 7 girls, who are locked in a room, have to find hidden clues and must cooperate with one another to escape. Because of a trap, the first victim comes out…

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.