Itsuki Hashima is a light novelist obssessed with little sisters, strictly focusing on tthem when he writes his stories. Despite his personality, he surrounded by various people, include beautiful genius writer who love him, a big-sisterly college classmate, a fellow male writer, a sadistic tax accountant, and his editor. As story progresses, the underlying conflicts of dreams and goals surface, as each character attempts to achieve their dreams, in theri own way.