One-Punch Man 1 ONE (2015)

Nothing about Saitama passes the eyeball test when it comes to superheroes, from his lifeless expression and bald head to his unimpressive physique. However, this average-looking guy has a not-so-average problem: he cannot find an opponent strong enough to take him on. Every time a promising villain appears, Saitama beats them with one punch. Can he finally find someone who can go toe-to-toe with him and give his life some meaning, or is he doomed to a life of superpowered boredom?