One-Punch Man, Vol. 1

After a grueling training regimen that left his hair bald but granted him overwhelming power, Saitama wanders the monster-infested streets of City Z as an unaffiliated hero. He has already defeated every foe he's faced with a single punch — and is now bored by the lack of challenge. When he joins forces with other heroes to take down increasingly powerful threats, his deadpan humor and absurd strength become the series' signature.