Seitarou moves to the Goukoukan school dormitory for his first year of high school—only to find the boys' dorm is full and he has been assigned a room in the adjoining girls' dorm. His fellow residents include two upperclassmen, a childhood friend, the school chairman's daughter, and several others with very distinct personalities. A year passes. The dorm becomes something like a family. Two new first-year students—the clumsy Mikamo and the composed Suzume—join at the start of the second year. Seitarou, whose cooking has become the dorm's unofficial institution, must navigate new feelings in a home already full of them.