童貞を喰いたいだけのヤリマン女子が開催する『SEX勉強会』に強●参加？大学に進学したボクは、都会に住む姉と同居することに。すると、姉は週末になると友達を集めて大騒ぎ！聞こえてくる話はエロ話ばかり！まさかの全員がヤリマン！？
Forced to participate in a "SEX Study Group" held by slutty girls who just want to eat virgins? After entering university, I decided to live with my sister who lives in the city. Then, on the weekends, my sister gathers her friends and makes a big fuss! All I can hear is erotic talk! All of them are sluts!?
