One-Punch Man Wiki

The Rumored Monster Arc is the fifth arc of the One-Punch Man series, and the second arc of the Hero Association Saga.


The Hero Association staff are having a meeting, discussing reports from various cities. The association sends Spring Mustachio and Golden Ball to investigate rumors about the abandoned section of Z-City. They encounter Kombu Infinity, who defeats them. The monster informs them that it isn't the rumored monster, but seeks to become the monster for fun. It encounters Saitama, who steals its kombu hair to make soup. Genos believes Saitama is trying to regrow his hair with the kombu, but Saitama firmly denies it.

Story Impact[]

  • The existence of the Monster Association is hinted at for the first time.
  • It is revealed that the Hero Association leaves certain heroes in-charge of certain cities.
    • Sneck is in-charge of F-City, Mushroom and Horse-Bone are in-charge of H-City, Lightning Genji is in-charge of D-City, Heavy Kong is in-charge of W-City and Watchdog Man is in-charge of Q-City.
    • Genji mentions that B-City and D-City are still being repaired after Marugori's attack.
    • Sneck is spying on Hammerhead, who is looking for a job.

Major Battles[]


  • The Rumored Monster Arc is the first original Manga story arc.

Site Navigation[]

Story Arcs
Introduction Saga Saitama Introduction Arc House of Evolution ArcParadise Group Arc
Hero Association Saga
Human Monster Saga Garou Introduction ArcThe Blizzard Group ArcHero Hunt ArcMonster Raid ArcSuper Fight ArcMonster Association Arc
Neo Heroes Saga
Rumored Monster Arc
Manga Chapters 20
Manga Volumes
Webcomic Chapters None
Fights Spring Mustachio and Golden Ball vs. Kombu Infinity