Based on the adult game by Syrup: Many Milk. Demons are attacking earth, releasing a field that drives men to wild lust and absorbing the carnal energy that results in order to replenish their strength. Yuuri is chosen by Suzune-sensei to become an Angel Goddess and fight these creatures of darkness. When Suzune-sensei deems Yuuri capable enough to fight on her own, however, things begin to go horribly wrong. The demons have a new creature, capable of besting even an Angel Goddess. But the possessed men aren’t the only ones who want her, and her own gym teacher turns out to be a bigger threat and pervert than she could have dreamed. But she’s not the only one who’s been compromised…!

Morishita Wataru grew up on a motherless family, but despite his lonely environment, he worked hard and managed to enroll on the prestigious Ousei academy. The school is run by an old scholarship rule, in which the students’ grades are tied to the teacher’s evaluation, so the teachers inevitably gives the students an strict education. Morishita has good grades, but on a class where everyone is an excellent student, his grades where bellow the average. Her homeroom teacher Tsukishima Kyoko was particularly strict on him, and not only about his grades, but even on his daily life. Morishita was very stressed between the difficult studies and the harsh teaching, but he had someone to help him, she was the assistant homeroom teacher of his class Shirakawa Miwa, a kind, maternal woman who understanded Moshita’s circumstances and was always on his mind. However, she suddenly announced her marriage, and Morishita who lost his friend and only moral support fell into despair. Naturally he could not concentrate on his studies and ended up getting the lowest score on the scholarship test, ending up going to special classes after school. His stress was bigger than ever, now that her admired Miwa was going to be another’s man woman and his grades are the lowest. At that moment, his smartphone started to vibrate, checking it out of curiosity, there was an app he had never seen called “Hypnosys app”…