Keitaro Urashima is the only boy living in Hinata Lodge, an all-girl dorm. Despite the fact that he's kind of a screw-up, the competition to hook up with him is fierce, and hilarious cat-fights ensue. An already tumultuous living situation escalates to an uproar when Keitaro and the girls get the news that their home will transform into a commercial inn, with strangers from outside their school as guests!