A female college student and her male friend lose their sense of reason in a game of escaping from a locked room and end up getting creampied raw

A group of female college students (Riisa Kisaragi, Satomi Miyamoto, Wakaba Tsukimi, Nano Yazawa) and their male friend are tasked with the mission of accumulating semen and escaping from a locked room, but things gradually escalate, they lose their minds and end up having raw sex and creampies!