# WebtoonLib — Oshi No Ko #139

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

## Chapter
- number: 139
- release_date: 2025-05-29

### Summary
In the devastating aftermath of Kana's calculated verbal assault, Ruby is forced to confront a new, heartbreaking reality: her perfect mother, Ai, was a deeply flawed and suffering human. While this painful epiphany provides the exact breakthrough Ruby needs to portray Ai for the film, it comes at the apparent cost of her friendship with Kana. As onlookers watch the girls' fractured relationship in horror, completely misinterpreting Kana's gambit, a guilt-ridden Aqua observes the fallout, ready to support his sister through the emotional turmoil. With the rift between the two young idols growing wider, the question hangs heavy whether Kana's sacrifice of their bond is a temporary measure or a permanent break.
- summary_source: graph_aggregator
- summary_verification: unverified

### Characters involved
- Ai Hoshino — Main
- Aquamarine Hoshino — Main
- Kana Arima — Main
- Ruby Hoshino — Main

## Spoiler
- level: auto

### Safe teaser
In the devastating aftermath of Kana's calculated verbal assault, Ruby is forced to confront a new, heartbreaking reality: her perfect mother, Ai, was a deeply flawed and suffering human.

### Spoiler summary
In the devastating aftermath of Kana's calculated verbal assault, Ruby is forced to confront a new, heartbreaking reality: her perfect mother, Ai, was a deeply flawed and suffering human. While this painful epiphany provides the exact breakthrough Ruby needs to portray Ai for the film, it comes at the apparent cost of her friendship with Kana. As onlookers watch the girls' fractured relationship in horror, completely misinterpreting Kana's gambit, a guilt-ridden Aqua observes the fallout, ready to support his sister through the emotional turmoil. With the rift between the two young idols growing wider, the question hangs heavy whether Kana's sacrifice of their bond is a temporary measure or a permanent break.

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

## See also
- [WebtoonLib — Oshi No Ko #139](/series/oshi-no-ko-e5257b/chapter-139)
- for_series_detail: /llms-series/oshi-no-ko-e5257b

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