There’s a rumor about a DVD that curses anyone who watches it. Though no one seems to believe in the curse few are brave enough to see what’s on the DVD… Akuno Mika watches the DVD… and gets transformed into a succubus. She tries to keep the change a secret but loses control when her crush Kazuya approaches her… Later, Kana agrees to watch the DVD after two of her friends ask her. As a result of the curse she grows something regular women don’t have. Her sister Mai tries to help her get back to normal, but the two get more than they bargained for…

Based on the erotic manga by Fan no Hitori. Reika Shichijo was a student at the top of her class, until one day she suddenly became a dropout. Now she is responsible for her classmate Niimi-kun’s sexual pleasure to help him “study” better. In this world “Dropouts”, those who have failed to be admitted into university, are forcefully made to work. Especially beautiful students are obligated to pursue sexual labour AKA become sexual servants to the rest of society. Reika becomes the sex slave of one of her former classmates, Niimi-kun. She is now tasked with relieving his sexual tension, so he can study better. During their time in school Niimi-kun will have to adapt to his senpai becoming his new “study” partner, find out why and how she became a dropout and deal with the jealousy of his peers, especially Reika’s ex-boyfriend, Shiroshima.

They wake up in a white room remembering nothing— The protagonist Takato Keisuke and 6 others are locked up in these hidden white rooms. His childhood friend Hokari Kanae, classmate Ando Miyako, underclassmate Mikaba Rika, English teacher Aoi Natsuki, same year Byakuya Rinne, and classmate Manaka Nemu. While still confused about their unusual situation, a “mystery voice” suddenly speaks to them: “A game has now started. In order to escape the room, Keisuke is the “unlocker” and one heroine the “keyhole”. With an assigned act, he must “use the key”. After hearing the unreasonable and immoral requirements to win, Miyako gets pissed and snaps on the “mystery voice”. Suddenly the lights go out. The girls scream. The lights come back on, reilluminating the white room. They can see Miyako bound to a grotesque torture device. “Anyone who quits the game will die.” Her screaming begins in tandem with the electrical current. With eyes wide open in fear, she pisses and shits herself. Everyone else starts freaking out. However, Keisuke seemed to be getting aroused by Miyako’s appearance. That was his secret, his urge to assault and humiliate girls. However, Nemu could see right through him and knew. Nemu takes advantage, forcing the protagonist to submit to him as she brings her lips up to his: “This is a contract kiss.” Keisuke was surprised by Nemu’s behavior but he wants to protect Kanae and decides for the sake of escaping, he will violate the others. Can Keisuke escape the white rooms and return to his normal life? Or will he hold back his own dark urges?