# WebtoonLib — Sakamoto Days #31

## Series
- title: Sakamoto Days
- slug: sakamoto-days-301993

## Chapter
- number: 31
- chapter_key: 31
- release_date: 2025-05-29

### Summary
Following his brutal and efficient takedown of the assassins on the train, the chapter pivots to a heartwarming scene as Shin reunites with his adoptive father, Asakura, and the sniper Heisuke is officially welcomed into the Sakamoto crew. The peace is short-lived, however, as a sudden and dramatic shift in art style delivers a chilling introduction to the series' main antagonist, "X," also known as Kei Uzuki. This haunting reveal establishes the formidable new threat looming over Sakamoto and his found family.
- summary_source: graph_aggregator
- summary_verification: unverified

### Key events
- Introduction of X: The antagonist Kei Uzuki is revealed as the mastermind behind the bounty on Sakamoto.

### Characters involved
- Kei Uzuki — Supporting
- Asakura — Supporting
- Heisuke Mashimo — Supporting
- Shin Asakura — Main
- Tarou Sakamoto — Main

## Spoiler
- level: auto

### Safe teaser
Following his brutal and efficient takedown of the assassins on the train, the chapter pivots to a heartwarming scene as Shin reunites with his adoptive father, Asakura, and the sniper Heisuke is officially welcomed into the Sakamoto crew.

### Spoiler summary
Following his brutal and efficient takedown of the assassins on the train, the chapter pivots to a heartwarming scene as Shin reunites with his adoptive father, Asakura, and the sniper Heisuke is officially welcomed into the Sakamoto crew. The peace is short-lived, however, as a sudden and dramatic shift in art style delivers a chilling introduction to the series' main antagonist, "X," also known as Kei Uzuki. This haunting reveal establishes the formidable new threat looming over Sakamoto and his found family.

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

## See also
- [WebtoonLib — Sakamoto Days #31](/series/sakamoto-days-301993/chapter-31)
- for_series_detail: /llms-series/sakamoto-days-301993

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