# WebtoonLib — Dr. Stone #203

## Series
- title: Dr. Stone
- slug: dr-stone-5eb95b

## Chapter
- number: 203
- chapter_key: 203
- release_date: 2025-05-29

### Summary
The Kingdom of Science's global resource hunt brings the crew of the Perseus to India, where they seek out a mathematical genius crucial for their lunar mission. The target is revealed to be Sai Nanami, Ryusui's brilliant but reclusive older brother. A prodigy with unparalleled calculation skills, Sai is the key to programming the computer needed to guide their rocket. However, recruiting him proves to be a challenge as the two eccentric brothers reunite, forcing Senku to navigate their dramatic dynamic to secure the final intellectual asset for their journey to the moon.
- summary_source: graph_aggregator
- summary_verification: unverified

### Key events
- The crew arrives in India and recruits Sai Nanami, a mathematical prodigy essential for programming the moon mission computer.

### Characters involved
- Ryuusui Nanami — character
- Senkuu Ishigami — character

## Spoiler
- level: auto

### Safe teaser
The Kingdom of Science's global resource hunt brings the crew of the Perseus to India, where they seek out a mathematical genius crucial for their lunar mission.

### Spoiler summary
The Kingdom of Science's global resource hunt brings the crew of the Perseus to India, where they seek out a mathematical genius crucial for their lunar mission. The target is revealed to be Sai Nanami, Ryusui's brilliant but reclusive older brother. A prodigy with unparalleled calculation skills, Sai is the key to programming the computer needed to guide their rocket. However, recruiting him proves to be a challenge as the two eccentric brothers reunite, forcing Senku to navigate their dramatic dynamic to secure the final intellectual asset for their journey to the moon.

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

## See also
- [WebtoonLib — Dr. Stone #203](/series/dr-stone-5eb95b/chapter-203)
- for_series_detail: /llms-series/dr-stone-5eb95b

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