Nagumi Koushi is a 12-year-old boy who was abandoned by his broke father after their house caught on fire, leaving him to roam the streets penniless. Then one day, a girl named Minerva who finds him lying on the sidewalk takes him to a women’s college dormitory, one known for housing troublesome residents, and asks him to be their "Dormitory Mother." Surrounded by more seasoned ladies and compelled to manage their eccentricities, Koushi begins his new (to some degree ecchi) life!