# WebtoonLib — Oshi No Ko #90

## Series
- title: Oshi No Ko
- slug: oshi-no-ko-e5257b

## Chapter
- number: 90
- release_date: 2025-05-29

### Summary
A new, calculating side of Ruby Hoshino emerges as the on-set conflict with the incompetent director takes a manipulative turn. It is revealed that the previous chapter's public confrontation was merely the opening act of Ruby's cold-blooded scheme. She engineers a new controversy involving a guest cosplayer, a "dirty trick" designed to oust the director and promote the more capable assistant director in his place. This ruthless manipulation, born from her own profound trauma, reveals a "black star" Ruby who is even more terrifyingly focused than her brother ever was, proving that the Hoshino twins' quest for justice is now being fought on two dark fronts.
- summary_source: graph_aggregator
- summary_verification: unverified

### Key events
- Ruby ruthlessly manipulates a TV production to oust an incompetent director, showing her 'Black Star' persona.

### Characters involved
- Aquamarine Hoshino — Main
- Ruby Hoshino — Main

## Spoiler
- level: auto

### Safe teaser
A new, calculating side of Ruby Hoshino emerges as the on-set conflict with the incompetent director takes a manipulative turn.

### Spoiler summary
A new, calculating side of Ruby Hoshino emerges as the on-set conflict with the incompetent director takes a manipulative turn. It is revealed that the previous chapter's public confrontation was merely the opening act of Ruby's cold-blooded scheme. She engineers a new controversy involving a guest cosplayer, a "dirty trick" designed to oust the director and promote the more capable assistant director in his place. This ruthless manipulation, born from her own profound trauma, reveals a "black star" Ruby who is even more terrifyingly focused than her brother ever was, proving that the Hoshino twins' quest for justice is now being fought on two dark fronts.

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

## See also
- [WebtoonLib — Oshi No Ko #90](/series/oshi-no-ko-e5257b/chapter-90)
- for_series_detail: /llms-series/oshi-no-ko-e5257b

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