Ryota, the son of the hot spring inn "Mandara-ya", is a third year student at Kokura Jonan High School. He is a healthy boy who is curious about the opposite sex and can be vulgar at times, but sometimes shows his mettle. One day, Sachiko, the daughter of a Bunbuku teahouse that had existed in the village about 15 years ago, returned to the Mandara shop. A yakuza comes from Kokura chasing after Sachiko, who seems to have a reason for it...What will Ryota do? A masterpiece that humorously depicts sex and customs from the perspective of an adolescent Ryota, set in a hot spring town in Kokura, Kitakyushu!!