One-Punch Man (Japanese: ワンパンマン Hepburn: Wanpanman?) is an ongoing Japanese webcomic created by an author using the pseudonym One, which began publication in 2009. The series quickly went viral, surpassing 7.9 million hits in June 2012.[5] The name is a play on the long-running children's character Anpanman, as punch (パンチ panchi?) is not usually shortened to pan (パン?).
Onepunch-Man follows the life of an average hero who manages to win all of his battles with only one punch! This ends up being the cause of a lot of frustration as he no longer feels the thrill and adrenaline of fighting a tough battle.
Maybe all of his rigorous training to become strong wasn't worth it. After all what's so good about having an overwhelming power?
In the world of One Punch Man, heroes are pinned against monsters in a battle to protect humanity. Start as an unregistered hero and make your way up the ranks, or claim a canon character and lead other heroes. The other path you can take is the dark path, one with monster characters and human monsters.
http://www.mangapanda.com/onepunch-man (Seinen Manga)
http://www.mangapanda.com/onepunch-man-one(Original Webcomic)