Toumei Otoko (the Invisible Man)

In his youth he played truant; as a grown man nothing has changed. Only now, instead of disappearing from school and being seen around town, he disappears entirely and sneaks into school. Two girls in gym class are the target for Toumei Otoko. The protagonist was a happy-go-lucky person when he was young, and as he grew older, it seems that nothing has changed. Now, instead of skipping school and its classes, he skips work and creeps into a random college so he can take a look at some young hot girls. The name of this perverted is Toumei Otoko.