Kouatarou takes over his uncle's, Ichinose Suguru, cafe, Sky Blue, after the ghost of his uncle visited him during the night. His uncle asks him to take over the cafe and take care of his daughter, Hina. A mysterious artist, named Yusa Reon, has been helping Koutarou out the first few days and Koutarou's childhood friend, Izumi, joins them later on. Things seem to be going alright, until they find out the cafe has a debt of 5 million yen.