One-Punch Man

After three years of basic push-ups and squats leave Saitama strong enough to obliterate any kaiju with a single casual punch, his biggest battle becomes depression, grocery-store bargain sales, and Hero Association bureaucracy. Season 1 director Shingo Natsume assembled an all-star freelancer roster at Madhouse for benchmark 2D action. Season 1 under Shingo Natsume and Madhouse remains a high-water mark of freelance 2D action animation. Flips shonen tension by making minor hero Mumen Rider's doomed stand against Deep Sea King genuinely heroic. Introduces compelling anti-villain Garou in Season 2 to give the supporting S-Class roster real threat escalation. Opens with JAM Project's fist-pumping anthem THE HERO!! alongside deadpan workplace satire.