Tora-san returns to his family's home to attend an elementary school class reunion. After he embarrasses himself by getting drunk and insulting all his ex-classmates, he resumes his travels. In Kyushu he meets an outspoken 18-year-old girl who becomes enamored of Tora-san and follows him around. One of Tora-san's old friends is terminally ill and makes Tora-san promise him to marry his wife once he is gone.
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.
Unlike traditional gangster movies, it is a gangster swashbuckler that mixes romance and humanity with a yakuza lover as the main character. A young man who heard that his former boss was killed is imprisoned by slashing his family's minions, and his lover is tortured by the enemy, but rescued by the imprisoned young man's nemesis.
A cosmetics saleswoman falls for a rival executive.