Chapter 180 (Online): In the Middle of Something

The prolonged fight between Saitama and Tatsumaki wears on, and Saitama's drive to keep going begins to fade. Tatsumaki's power tears the jacket from his back and pelts him with a volley of blasts that hurl him across great distances. At the Hero Association headquarters, Fubuki formally breaks with the Blizzard Group and walks away, having accepted that her sister truly means to pull her free of it.

In N-City, the A-Class hero Feather lies badly battered after taking on the city's dominant gang, the Iron Fist. He had fought to rescue a captive named Erika, only to discover she is actually the girlfriend of the gang's boss, Big Iron, and had been playing a part to lure him into a trap. Reading her real feelings, Feather senses that Erika longs to escape the gang, and he resolves to save her anyway. Before he can act, Saitama comes smashing through the wall on the back of Tatsumaki's attack and knocks Feather out cold. The two leave once the gang is wrecked in the process, and the incident turns Erika into a fan of Tatsumaki.

Elsewhere, in H-City, the enormous hedgehog-like Kenzan Rat rampages with a threat rating bumped from Demon up to Dragon. Metal Bat is dispatched to bring it down, but the moment he shows up, the creature is destroyed as collateral damage from the ongoing Saitama and Tatsumaki brawl. Winded from running the whole way, Metal Bat simply decides to compose himself and head home.

Saitama and Tatsumaki's fight continues to escalate, stripping Saitama's jacket and sending him flying. Fubuki cuts ties with the Blizzard Group. In N-City, Feather realizes Erika's rescue was a trap set by the Iron Fist gang, then is knocked out when Saitama crashes in, and the gang is wiped out. In H-City, the Dragon-level Kenzan Rat is killed as collateral damage before Metal Bat can engage it.

This online release is the 180th chapter of the One-Punch Man manga, part of the Psychic Sisters Arc, and it adapts webcomic Chapters 103 and 104. Metal Bat is the cover character. The chapter highlights how the sisters' fight causes widespread collateral damage, resolving the Feather subplot and destroying a Dragon-level monster without either combatant noticing.