Naotatsu Kumazawa is set to start high school. To commute to school, he will stay with his uncle, Shigemichi Utagawa's . On a heavily rainy day, Naotatsu arrives at the nearest stop from his uncle's house. At that time, a strange adult female, Chisa Sakaki , is waiting for him at the station. She takes him to a sharehouse. Naotatsu begins to live with other people at the share house including Chisa Sakaki, his uncle Shigemichi Utagawa, Hayate Izumiya and Kenzo Naruse. All the people there come from different backgrounds. Chisa is a 26-year-old office worker. Shigemichi Utagawa is a manga writer, but his parents don't know that he quit his regular job to become a manga writer. Hayate Izumiya is a cross-dressing fortune-teller. Kenzo Naruse is a university professor who travels all around the world. Living with them, Naotatsu becomes to have feelings for Chisa, who says she doesn't want a romantic relationship. Naotatsu and Chisa had an unexpected connection in their past. What is the reason Chisa doesn't want to have a romantic relationship?