Our Happiness Alone(二十一歳の父)

Mototsugu is the younger son of Akira Sakawa, a director of an advertising agency whose mother, Nobuko, is ill with cancer of the liver. His elder brother, Ichiro, works at the Bank of Japan whose wife, Masuko, is from a very high-class family. Mototsugu becomes disgusted with such strait-laced living and leaves home to marry Yoshiko, a blind masseuse, and they live in a small apartment near a pinball parlor where he works.