This romantic comedy revolves around a second-year high school student named Sorata Kanda who lives in Sakurasou, a dormitory for problem children. One day, Mashiro Shiina — a cute girl who happens to be a cosmopolitan and brilliant artist — moves into Sakurasou. But this girl has an embarrassing secret: she has no idea how to take care of herself. She gets lost if she goes out and her room is a complete mess. Sorata’s dorm mates tell him to keep an eye on her and designates him as her “master”.