Falling ... I can't go against it ... Not a command, but myself-- A female body urinal "public toilet" that is installed as a sexual outlet for students. The student council president, Reika, has been selected as the "public toilet". Restrained in the toilet ○ Excretion. Besides, Reika is robbed of her virginity in front of everyone ... On the other hand, Ryo Sakurai is excited about the appearance of a “public toilet”. Chika Takamine stares at such Ryo lonely. In front of her Ryo who invited her to her home, Chika shows her in the same swimsuit as her "public toilet". Chika says she will be Ryo's public toilet, and she chews on Ryo's penis ...!?