One Punch-Man

From Viz:
Every time a promising villain appears, Saitama beats the snot out of ’em with one punch! Can he finally find an opponent who can go toe-to-toe with him and give his life some meaning? Or is he doomed to a life of superpowered boredom?

Note:
Was nominated for the seventh annual Manga Taishō Award in 2014, an Eisner Award in 2015 and a Harvey Award in 2016. Won the Sugoi Japan Award and the Spanish Manga Barcelona award in the seinen category in 2017.

Official Japanese
Official English

Read One Punch-Man latest chapter on Shueisha TV