Watching Mob Psycho 100 Season 2 Episode 4 and Mr.One put One schlagen, punsch 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.
this is a really good show, not vary long but its great haha :) it does have nudity so careful that children aren't around... that might get awkward o.o LOL