Aida Yurume is a ronin student who came to Tokyo to prepare for university entrance exam. But the place was a back district, where the address Tokyo is so ill-fitting. The residents of the apartment are Kawano Sae, a veteran ronin with straight-man character, Tanaka Kumi, an innocent-looking girl and Matsukishi, a young man looking twice as his age. The story depicts their slow and comfortable life of preparing for university.