Description The lives of quiet student Susumu and all the residents of his condo complex change for good when an enigmatic stranger moves in. Suddenly, the kind piano teacher who lives next door is offering Susumu a different kind of lesson: she wants to teach him how to fuck! After busty Takase takes Susumu's virginity, the lessons continue with another student, cute Noriko, and the lines between fantasy and reality start to blur! Susumu watches as Takase and Noriko try things they've never done before, even anal sex, before he finds himself in the middle of a hot futanari threesome. What does the mysterious new neighbor want with the condo residents, and how much nastier are things about to get?