One-Punch Man

Saitama

Saitama (サイタマ, Saitama) is the main protagonist of OnePunch-Man and the most powerful hero alive. Saitama faces a self-imposed existential crisis, as he is now too powerful to gain any thrill from his deeds.

He registered with the Hero Association as a C-Class and eventually made a big leap to become a B-Class Superhero and is tasked to defend Z-City against Mysterious Beings. Under the Hero Association, he is given the name Caped Baldy (ハゲマント, Hagemanto).

source : http://onepunchman.wikia.com/wiki/Saitama

One-Punch Man

OnePunch-Man (ワンパンマン WanPan-Man) is a Japanese webcomic and manga series created by ONE. The webcomic started in July 2009, with more than 10 million total views and 20,000 hits per day. Sheuisha's Young Jump Next picked up the series, as well as commissioned Yusuke Murata, (known for Eyeshield 21) to draw the series with the original writer, ONE.