# WebtoonLib — One-Punch Man #149

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

## Chapter
- number: 149
- release_date: 2025-05-29

### Summary
Just as S-Class hero Flashy Flash's serious attempt to understand Saitama devolves into a bizarre domestic squabble over rent, the scene is crashed by the dramatic return of a long-absent rival. Speed-o'-Sound Sonic, Saitama's self-proclaimed nemesis, finally reappears to issue a challenge, only to find his grand entrance complicated by the presence of another, higher-ranked ninja. A tense and comedic standoff ensues between the two speedsters, leaving Saitama and Genos caught in the middle of an unwelcome ninja house party.
- summary_source: graph_aggregator
- summary_verification: unverified

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

## Spoiler
- level: auto

### Safe teaser
Just as S-Class hero Flashy Flash's serious attempt to understand Saitama devolves into a bizarre domestic squabble over rent, the scene is crashed by the dramatic return of a long-absent rival.

### Spoiler summary
Just as S-Class hero Flashy Flash's serious attempt to understand Saitama devolves into a bizarre domestic squabble over rent, the scene is crashed by the dramatic return of a long-absent rival. Speed-o'-Sound Sonic, Saitama's self-proclaimed nemesis, finally reappears to issue a challenge, only to find his grand entrance complicated by the presence of another, higher-ranked ninja. A tense and comedic standoff ensues between the two speedsters, leaving Saitama and Genos caught in the middle of an unwelcome ninja house party.

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

## See also
- [WebtoonLib — One-Punch Man #149](/series/one-punch-man-4f9667/chapter-149)
- for_series_detail: /llms-series/one-punch-man-4f9667

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