The Tenpo period near the end of the Edo period is one of reform. Katsuya Kokichi has very strong arms and his wife Onobu can’t say she doesn’t like it when asked about them. He is confident even when he attracts trouble and likes to fuss about things. Katsuya’s wife struggles to make ends meet but still manages to keep smiling innocently. Their son Rintaro is clever, intelligent, and aspires to take Dutch studies so that eventually he can save the people of Edo as “Katsu Kaishu.” He has recently fallen for a Fukagawan geisha!