Young female teacher Kyoko Miyake relocates to a small seaside town with her runaway little sister, but their new life is complicated by hoodlum-like Jiro Yamazaki (the black sheep of the title) who is related to the family hosting them and whom they keep running into, but can't help but to feel sympathy for. Of course, rumours start fast in a small town, but delightfully she doesn't really care at all. This is another very solid Shogoro Nishimura film.

Like a girl runaway, Tsuyu moves to Osaka to work as a bar hostess. She meets the owner of a model school, Yoko, and seriously thinks about becoming a fashion model. Yoko tells her that she can move in to Yoko’s house to take lessons, while making a living at the same time.

Keiko is pretty and intelligent but her home life is not a happy one. Never having known a father's love, she develops a possessive attachment to Mr. Mazaki, the new mathematics teacher.