# Crimsooon Sun — Mystery Novel Adventure

> A mystery novel adventure game focused on deduction and intuition. (iPhone/iPad app by Kyohei Yamada.)

- Source: https://appshunter.io/ios/app/crimsooon-sun/id6739424746 (this page in markdown: same URL + `.md`)
- Developer: [Kyohei Yamada](https://appshunter.io/developer/1583465790)
- Category: Games, Adventure, Casual
- Price: $1.99
- Age rating: 12+
- Requires: iOS 13.0 · 248 MB
- Languages: American English
- Released: 2024-12-27
- Data updated: 2026-08-18
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/crimsooon-sun/id6739424746/reviews.md

## What is Crimsooon Sun?

No Choices But Deduction.
     No Game Over.
     No Multiple Endings.

     Your choices will change neither the story nor the movement of the celestial bodies.
     The only thing you can do is pull the trigger—and deduce.


     "Crimsooon Sun" is a short mystery adventure designed with a singular concept: "A mystery game you can play with the same level of focus as reading a detective novel."

     The story takes place in Shirase, a regional city in the Tohoku region. It begins with the return of Mio Fujimaru, a university student who had been missing for nearly six months. She remains silent about her disappearance. However, a video exhibited at the university festival reveals a chilling sight: Misao being pushed down a wedding aisle in a wheelchair by a mysterious "the Faceless Man," while "the Dual Suns" are reflected in the window.

     This is a mystery "novel" adventure. When reading a detective novel, one doesn't always have a perfect, logical solution like the detective in the story. Often, we rely on vague intuitions:
     "Something about this statement feels like a lie."
     "This person seems suspicious."
     "This description might be related to a trick."
     Such intuitive reasoning often clashes with traditional game systems that require picking the "correct" choice to proceed.

     Inspired by "Mikagura Shojo Tanteidan" (Mikagura Girls' Detective Agency), a classic title released for the PlayStation by Human Entertainment, this game cuts away all unnecessary choices and branching paths. Instead, you "pull the trigger" whenever something piques your interest. With the 26 bullets of information you’ve gathered, your only task is to deduce the truth.

     Defy the sun with twenty-six bullets.
     Even if the revolution of the heavenly spheres cannot be stopped.

## Key features

- Deductive reasoning gameplay
- Linear narrative structure
- Intuitive clue gathering
- No multiple endings
- Detective novel immersion
- Single-shot deduction system

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/crimsooon-sun/id6739424746/reviews.md

### 5/5 — ご馳走様でした。

*2025-04-09*

1周目はサンドイッチに気を取られてついつい推理が疎かになってしまい、ややすっきりしないままにエンディング。
2周目で各情報をしっかり理解し納得のエンディング。
前作、前々作に比べると生々しいというか、いくらか身近なテーマで重くもありましたが、しんみりとした味とユニークさがとても沁みました。
東の樹…行きてぇなあ…

### 5/5 — 面白い推理ゲーム

*2025-01-25*

全てが伏線になっていて推理するのが楽しかったですし真相がわかった後読み直してこれがヒントだとわかるのが気持ちかったです。
BOOTHにて後日談の短編がありますのでお店から出た後の人は是非。

## Frequently asked questions about Crimsooon Sun

### What is the gameplay like in Crimsooon Sun?

Crimsooon Sun focuses on deduction and intuition, similar to reading a detective novel. You gather 26 pieces of information and use them to deduce the truth, with no branching paths or game overs.

### Does Crimsooon Sun have multiple endings?

No, Crimsooon Sun is designed with a singular concept and does not feature multiple endings. The story and its progression are fixed, allowing for a focused narrative experience.

### Is Crimsooon Sun available offline?

The provided data does not specify offline play capabilities. However, as a narrative-driven game, it is likely playable without a constant internet connection.

### What is the age rating for Crimsooon Sun?

Crimsooon Sun has an age rating of 12+, making it suitable for a teenage audience and above.

### How often is Crimsooon Sun updated?

The latest version is 2.0.8, updated on July 30, 2026. This indicates a recent update, suggesting ongoing support and potential for future content.

### What devices can I play Crimsooon Sun on?

Crimsooon Sun is supported on iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users.

### What is the price of Crimsooon Sun?

Crimsooon Sun is available for a one-time purchase of $1.99.

### Does Crimsooon Sun have ads?

Crimsooon Sun does not contain advertisements, as indicated by the 'hasAds' flag being false.

## Version history (last 5 releases)

### 2.0.9 — 2026-08-11

v2.0.9
-Fixed typos and improved wording.

### 2.0.8 — 2026-07-30

v2.0.8
-Fixed an issue where CGs could not be zoomed in when viewed in the gallery after clearing the game.

### 2.0.7 — 2026-07-28

v2.0.7
-Overall adjustments to UI, volume, and polish.
-Added English support and language settings.
-Added a visual sequence at the start of the investigation.
-Added a loading animation during scene transitions.

### 1.0.5 — 2025-01-21

v1.0.5
・誤字脱字や表現の修正。

### 1.0.4 — 2025-01-06

v1.0.4
・プログレスバーが100%の状態でトリガーを引いてカットインが入る瞬間に章移動シートを呼び出すと、半端な状態でカットインが残ってしまって操作不能になるバグを修正
・推理編に一度入ってから二周目以降で再度推理編に入ると処理がおかしくなり、進行不能になる不具合を修正
・上の不具合修正にともなって、推理編に入ったあとで他の章へと移動できなくなる仕様を削除
・「っ」や「ゃ」などの拗促音や、「ー」長音に対して行っていた行頭禁則処理を、行わないように変更
・誤字脱字、表現の修正

## More apps by Kyohei Yamada

- [Cold Bed on Route](https://appshunter.io/ios/app/cold-bed-on-route/id1583465788)
- [with Mountain Smiling](https://appshunter.io/ios/app/with-mountain-smiling/id6476830609)

All apps by Kyohei Yamada: https://appshunter.io/developer/1583465790

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*