I don't think I can hold back my urges around this adult and voluptuous Zashiki-warashi!!! Preparing for his university entrance exams, Hiroshi started living by himself. However, a Zashiki-warashi was living in that apartment!? ...Except, she is incredibly voluptuous, doesn't look like a child at all, and is an adult-style Zashiki-warashi!!!! Moreover, this girl is a crybaby and clumsy, so she triggers airheaded ecchi situations every single time. Can Hiroshi really maintain his sanity and successfully pass his university exams!!? Living with a lewd Zashiki-warashi while practicing abstinence!! A comedy on the edge of sanity!!!!