Shinozaki Haruka is dating the class leader Kosaka Akiho, who is a very serious girl. After mistaking her boyfriend's sexual fetish, she earnestly studies all kinds of sexual knowledge, which makes Haruka, her boyfriend, unable to resist. Moreover, the friends and family around the hero and heroine are all weird. Akiho's mother implements the elite education of "virgin bitch" for her daughter. The hero is surrounded by a childhood sweetheart who loves sexual harassment, a masochistic classmate, an extremely brother-control sister, and so on.