Monster Raid Arc

The thirteenth arc of the series and the fourth of the Human Monster Saga, this manga-original chapter escalates the monster threat into coordinated citywide assaults. It weaves together Metal Bat's grueling defense of a sponsor's family, Garou's continuing hunt, and the opening rounds of the Super Fight tournament that Saitama has infiltrated under a false name.

Fearing Garou's attacks on its staff, the Hero Association assigns heroes to guard its cadres, and Metal Bat is saddled with protecting the sponsor Narinki and his spoiled son Waganma. Their meal is interrupted when Junior Centipede and Venus Mantrap surface to seize the boy, dragging Metal Bat into a fight that only widens as Senior Centipede and the gas-spewing Rafflesidon join in. He grinds through them all, but the Dragon-level Elder Centipede then erupts, its armored shell shrugging off his every strike.

Drawn by the disaster alert, Garou arrives and attacks the exhausted Metal Bat, and the two trade blows until his little sister Zenko throws herself between them, forcing an end to the duel. Garou departs for Watchdog Man, brushing off Phoenix Man's invitation to join the Monster Association by tearing up the offered card. The monsters instead abduct Waganma, with Rhino Wrestler bulldozing the weaker heroes and Elder Centipede carrying the cadres away, all while cities across the region come under simultaneous attack.

At the C-City stadium, Saitama competes disguised as Charanko while Genos hunts down monsters throughout the city, felling Face Ripper and clashing with the elusive Awakened Cockroach. Suiryu, a five-time champion, dominates his early matches, and Saitama dispatches his own opponents with casual ease. Elsewhere Bang shatters Fist Fight Djinn, and Fubuki resists Do-S's mind control long enough for Tatsumaki to sweep in and neutralize the monster's enslaved thralls.

The coordinated raids leave the Hero Association reeling and, crucially, hand the Monster Association its prized hostage in Waganma, setting the stage for the war to come. Garou's refusal of Phoenix Man's recruitment keeps him a wild card outside both factions, while the tournament continues toward its later rounds with Saitama still hiding in plain sight.