A Tale of 42°C (1991)

Hanada Zenkichi is the third son of Hanada inn, which has been in business for 150 years. He is only in his first year of high school, but his playboy father, Zentarou, has run away from home with a debt of 100 million yen. His two older brothers are unmotivated and expect Zenkichi to take over the inn, but he himself is worried about his future. Then one day, Sachi, who claims to be Zentarou's illegitimate daughter, arrives... Set in the hot spring district of Usagi, this is Yamada Naito's second debut work, a pure-hearted graffiti about a hot bath town!