Ganso Dai Yojohan Dai Monogatari

Ganso Dai Yojohan Dai Monogatari (元祖大四畳半大物語, literally Ancestral Great 4½ Tatami Great Story) is a slice of life manga by Leiji Matsumoto. It has been referred to by the fan community as a more mature predecessor to the successful Otoko Oidon which was released a year after the end of this series with some chapters possibly connecting the two series together.

Synopsis
Kyushu youth Adachi Futoshi had come to Tokyo to make a life for himself but has to live in a cheap apartment at a boarding complex while dealing with the day and night struggles of life including post-war positions and sexual orientations.