# WebtoonLib — The Origin of Species #31

## Series
- title: The Origin of Species
- slug: the-origin-of-species-d4bb2a

## Chapter
- number: 31
- release_date: 2025-03-13

### Summary
This chapter confirms the devastating betrayal foreshadowed previously, as Lee Youngjin actively works against Seo Seunghyun. The central conflict stems from Youngjin's misguided loyalty to a mysterious figure from his past, referred to only as "Sir." Readers widely believe Youngjin is undertaking this "last job" in a naive attempt to finally earn his freedom, a desire rooted in his past trauma which prevents him from trusting Seunghyun's recent, genuine affection. While the technical specifics of the plot have left a significant portion of the readership confused, the emotional impact of the betrayal is universally understood, creating a powerful atmosphere of angst and dread. Speculation is rampant, with two dominant theories emerging: one suggests that Seunghyun is already aware of the plot and is orchestrating a sophisticated double-cross to trap "Sir," and another, more persistent fan theory, questions whether Youngjin might be pregnant. The chapter solidifies a painful act of disloyalty, leaving the relationship on a knife's edge as readers brace for the inevitable, dramatic fallout of Seunghyun's discovery.
- summary_source: graph_aggregator
- summary_verification: unverified

### Key events
- Youngjin betrays Seunghyun to return to Sir, believing it is the only way to gain his freedom.

## Spoiler
- level: auto

### Safe teaser
This chapter confirms the devastating betrayal foreshadowed previously, as Lee Youngjin actively works against Seo Seunghyun.

### Spoiler summary
This chapter confirms the devastating betrayal foreshadowed previously, as Lee Youngjin actively works against Seo Seunghyun. The central conflict stems from Youngjin's misguided loyalty to a mysterious figure from his past, referred to only as "Sir." Readers widely believe Youngjin is undertaking this "last job" in a naive attempt to finally earn his freedom, a desire rooted in his past trauma which prevents him from trusting Seunghyun's recent, genuine affection. While the technical specifics of the plot have left a significant portion of the readership confused, the emotional impact of the betrayal is universally understood, creating a powerful atmosphere of angst and dread. Speculation is rampant, with two dominant theories emerging: one suggests that Seunghyun is already aware of the plot and is orchestrating a sophisticated double-cross to trap "Sir," and another, more persistent fan theory, questions whether Youngjin might be pregnant. The chapter solidifies a painful act of disloyalty, leaving the relationship on a knife's edge as readers brace for the inevitable, dramatic fallout of Seunghyun's discovery.

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

## See also
- [WebtoonLib — The Origin of Species #31](/series/the-origin-of-species-d4bb2a/chapter-31)
- for_series_detail: /llms-series/the-origin-of-species-d4bb2a

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