Miyu is a sullen college girl who doesn't have much sexual experience, but she actually fantasizes about ``I want to fuck a guy with a big dick.'' Although she has a boyfriend, Makoto, who is a serious type of person like herself, she was not satisfied at all with sex with him. One day, at the suggestion of her professor Oshima, she goes to a research camp with her boyfriend and her classmates. She dislikes Oshima's overbearing and clingy personality.