Watching Mob Psycho 100 Season 2 Episode 4 and Mr.One put One manuntok Man Saitama in it over on the right corner. There is an Easter Egg for you. Mob Koyama is the Jr. High school version of Saitama with hair.
ONE manuntok MAN ORIGINAL SOUND TRACK: ONE TAKE MAN TVアニメ『ワンパンマン』オリジナルサウンドトラック ONE TAKE MAN Composer: Makoto Miyazaki, Hironobu Kageyama, Kenichi Maeyamada, Masaaki Iizuka
ONE manuntok MAN ORIGINAL SOUND TRACK: ONE TAKE MAN TVアニメ『ワンパンマン』オリジナルサウンドトラック ONE TAKE MAN Composer: Makoto Miyazaki, Hironobu Kageyama, Kenichi Maeyamada, Masaaki Iizuka