In this outing of Harenchi Gakuen the students undergo a health check after school, but all is not what it seems. Teacher 'Beard Godzilla' has kicked out the infirmary's doctor and taken his place. A trio of students notice the trick and dress up as medical professionals to assist the female portion of the school body. A newspaper has caught wind of this.
Two rival groups of gangsters vie for control of a tiny port town in northern Japan. Daisuke, a member of the older of the two gangs, and Kosuke, a hoodlum in the newer gang, both fall in love with the daughter of an inn proprietor, even though she evinces more interest in improving the town than in their romantic advances. Eventually, the two hoodlums come to respect her efforts and decide to join forces in ridding the town of all gangsters. The two men succeed in restoring peace to the town and, rejected by the innkeeper's daughter, they leave town as friends.
Picked up and raised on an island in the Seto Inland Sea, Yasukichi's only trait is his innate mischievousness. However, because his love for his hometown is exceptionally stronger than anybody's, he is trying everything he can to somehow help the inhabitants of the island which are going through a recession. He saddles himself with a debt to bring a cheap band onto the island and tries to market the underwater sightseeing ship on the island without regards for the Marine Act.
