Souta is a second-year student at Seirei Gakuen who has an extraordinary sex drive. Even as many students (mostly girls) kept their distance away from him, he still pressed on with his pointless actions to achieve his goal of a fulfilling erotic school life. He was marked as a dangerous person by most people and at risk of being outcast by society. But it wasn’t always like this: he couldn’t think of anything but lewd thoughts. Just seeing a lady walk down the street makes him want to fondle her breasts.
Then a mysterious bishoujo appeared before him. The self-proclaimed witch Hazuki told him that his demon side had awakened inside of him and it was the demon of lust, Asmodeus, which granted him the ‘porno switch’ ability, causing females around him to feel lewd. The cause of his awakening was due to a hidden treasure which was stolen from her family. She had come to this town to search for it, and enlisted his help.
From that day on, he was caught in outrageous events one after the other. Will the day come when his uncontrollable urges subside?