The protagonist of the story, a guy named Yuma Oda, gets a super app on his smartphone called "hypnosis". The hero of course doesn't believe in the miracle and tries the app on his fellow students... Yuma can't believe his eyes the app really worked! Later the hero discovers that he has become one of the testers of the app from the succubus "Arjume Rina". As his main target, Yuma chooses the extravagant gyara classmate Fujimiya, who has become famous for her feisty personality. He decides to turn her into his personal sex slave... , after Oda Yuma first amuses himself with Fujimiya Anzu as a sex toy and then with Akizuki Sakurano, head of the public morality committee, as a member of the sexual entertainment club, he treats both of them as sex toys. In fact, after updating the app, it is now possible to hypnotize two people at the same time, and of course Fujimiya and Akizuki are chosen as the targets. The two submissives unleash their hidden desires and enjoy every inch of Yuma's body with gusto. This continues until their sexual desire fades. In the story, Rina Arume suddenly informs the hero that their contract as an application tester has expired and that he must now pay the bill. In exchange for the contract, he is required to pay with the energy of male sperm, which is the power source for this whore. And while Yuma tries in every way to satisfy the succubus' hunger as the main course, Rina's sexual appetite consumes her, and soon she herself turns into a beast. Will it be torment for the hero or pleasure... Which will be the end result?