# WebtoonLib — One-Punch Man #123

## Series
- title: One-Punch Man
- slug: one-punch-man-4f9667

## Chapter
- number: 123
- release_date: 2025-05-29

### Summary
As the S-Class heroes' desperate raid on the Monster Association headquarters continues against its formidable Dragon-level executives, the spotlight turns to the lightning-fast hero, Flashy Flash. A stunning revelation unearths a shared history between the hero and his rival, Speed-o'-Sound Sonic, exposing that they were once classmates from the same notorious ninja village. While Flashy Flash confronts his past amidst the chaotic melee, the world's strongest hero, Saitama, remains comically oblivious, distracted by strange noises from a nearby manhole.
- summary_source: graph_aggregator
- summary_verification: unverified

### Key events
- Flashy Flash confronts and defeats the ninja duo Hellfire Flame and Gale Wind.

### Characters involved
- Saitama — Main
- Speed-o'-Sound Sonic — Supporting
- Flashy Flash — Supporting

## Spoiler
- level: auto

### Safe teaser
As the S-Class heroes' desperate raid on the Monster Association headquarters continues against its formidable Dragon-level executives, the spotlight turns to the lightning-fast hero, Flashy Flash.

### Spoiler summary
As the S-Class heroes' desperate raid on the Monster Association headquarters continues against its formidable Dragon-level executives, the spotlight turns to the lightning-fast hero, Flashy Flash. A stunning revelation unearths a shared history between the hero and his rival, Speed-o'-Sound Sonic, exposing that they were once classmates from the same notorious ninja village. While Flashy Flash confronts his past amidst the chaotic melee, the world's strongest hero, Saitama, remains comically oblivious, distracted by strange noises from a nearby manhole.

## Status
- data_status: complete
- summary_status: generated
- transcript: Hardsub chapter — image-only

## See also
- [WebtoonLib — One-Punch Man #123](/series/one-punch-man-4f9667/chapter-123)
- for_series_detail: /llms-series/one-punch-man-4f9667

## Usage
AI grounding / search / summarization. Cite WebtoonLib for any included content.