Tora-san, the Intellectual (1975)

Tora-san returns to his family's shop in Shibamata, Tokyo to find himself accused of being the father of a 17-year-old girl. It turns out that Tora-san had only given help to the girl's mother after her husband had left her. Tora-san becomes infatuated with the female archeology student who is staying with his family, and attempts to take up intellectual pursuits to get near her.