---
title: "Murder Mystery Paradox - Kono Hitonatsu no Juugonen"
description: "August, 2004. Shikinejima — a secluded island that only a few hundred people call home.  Fifteen-year-old Itsuki Amazawa has come to visit the island for the ve"
image: "https://t.vndb.org/cv/45/82545.jpg"
---

# Murder Mystery Paradox - Kono Hitonatsu no Juugonen

![Murder Mystery Paradox - Kono Hitonatsu no Juugonen](https://t.vndb.org/cv/45/82545.jpg)

**Alternative Title:** マーダーミステリーパラドクス このひと夏の十五年

**Aliases:** Murder Mystery Paradox: Fifteen Years of Summer, 谋杀谜案悖论 悠悠一夏十五载

**Developer:** 213℉

**Release date:** Dec 2, 2023

**Platform:** Windows

**Language:** Japanese, Chinese (simplified)

**Rating:** 6.6/10 (10 votes)

## Description
August, 2004.
Shikinejima — a secluded island that only a few hundred people call home.

Fifteen-year-old Itsuki Amazawa has come to visit the island for the very first time.
At his adoptive mother's childhood home, he and his newly met cousins pass the summer days in peace and quiet.

That is, until Itsuki learns the truth about the island...

Strange incidents known to the locals as "Shikinejima Vanishings" have been occurring around the island.
And deeply entangled in these puzzling happenings are people that Itsuki holds dear.

Will he be able to uncover the truth and save those he cares about? 

[From [Steam](https://store.steampowered.com/app/2203040/)]

## Characters
### Amazawa Itsuki (天沢 樹)
- **Gender:** Male
- **Hair:** Short, Parted to Side
- **Personality:** Proactive, Boku, Smart
- **Role:** Orphan
- **Clothes:** Sports Shoes
- **Engages in:** Investigation, Time Travel

### Amazawa Nin (天沢 仁)
- **Gender:** Male
- **Personality:** Boku, Smart, Confident, Watashi
- **Engages in:** Planning, Blackmail, Murder, Torture, Confinement, Manipulation, Impersonation
- **Role:** Husband, Father, Friend

### Ichinose Iroha (一ノ瀬 彩葉)
- **Gender:** Female
- **Clothes:** Skirt, Sports Shoes, Tank Top
- **Subject of:** Homicide, Guilt
- **Role:** Older Sister
- **Personality:** Watashi

### Ichinose Utaha (一ノ瀬 歌葉)
- **Gender:** Female
- **Hair:** Short, Blunt Bangs
- **Clothes:** Sandals, Sleeveless Dress
- **Subject of:** Kidnapping, Attempted Homicide
- **Role:** Younger Sister
- **Personality:** Watashi, Cheerful

### Sakura Chiyo (佐倉 千世)
- **Gender:** Female
- **Aliases:** Granny Sayo, 千世ばあちゃん
- **Body:** Old
- **Engages in:** Photography
- **Personality:** Watashi

### Sakura Youhei (佐倉 陽平)
- **Gender:** Male
- **Aliases:** You-chan, ようちゃん
- **Hair:** Short
- **Clothes:** T-shirt, Sandals
- **Personality:** Ore

### Amagawa Kumiko (天沢 久美子)
- **Gender:** Female
- **Role:** Wife, Mother
- **Personality:** Watashi

### Ebihara Ken'ichi (海老原 健一)
- **Gender:** Male
- **Personality:** Ore, Kind
- **Subject of:** Blackmail, Homicide, Debt
- **Engages in:** Murder

### Kageyama Minoru (影山)
- **Gender:** Male
- **Clothes:** Glasses
- **Role:** Servant, Teacher, Principal
- **Personality:** Watashi
- **Subject of:** Manipulation

### Kamishiro Yuu (神代 優)
- **Gender:** Male
- **Engages in:** Planning, Murder, Patricide
- **Role:** Medical Doctor
- **Personality:** Smart, Watashi

### Kusakabe Kiyoshi (久坂部 清)
- **Gender:** Unknown
- **Personality:** Boku, Smart
- **Role:** Medical Doctor
- **Engages in:** Investigation
- **Subject of:** Grief

### Makino Riku (牧野 理久)
- **Gender:** Male
- **Personality:** Proactive, Boku
- **Subject of:** Amnesia, Coma, Hospitalization
- **Role:** Police
- **Engages in:** Investigation

### Mashima Satoru (真島 聡)
- **Gender:** Male
- **Personality:** Boku
- **Engages in:** Suicide, Investigation, Kidnapping
- **Subject of:** Blackmail, Homicide, Manipulation
- **Role:** Police

### Sakura Daisuke (佐倉 代助)
- **Gender:** Male
- **Personality:** Ore, Brave
- **Role:** Father
- **Subject of:** Death

### Sakura Ryou (佐倉 亮)
- **Gender:** Male
- **Personality:** Boku
- **Role:** Husband, Father

### Suspitious man (不信な男)
[spoiler]In truth, he is Itsuki who came from the future. He was confined for 18 years.[/spoiler]

- **Gender:** Male
- **Personality:** Proactive, Ore, Stubborn
- **Engages in:** Suicide, Time Travel, Attempted Murder
- **Subject of:** Confinement

### Yuuki Emi (結城 恵美)
- **Gender:** Female
- **Role:** Teacher
- **Personality:** Watashi
- **Subject of:** Grief

### Hirose Akane (広瀬 茜)
- **Gender:** Female
- **Role:** Student
- **Subject of:** Confinement, Mental Breakdown, Pre-Story Death
- **Personality:** Watashi

### Kamishiro Yoshio (神代 義雄)
- **Gender:** Male
- **Role:** Father
- **Personality:** Strict, Watashi, Cruel
- **Subject of:** Confinement, Homicide

### Kusakabe Rika (久坂部 梨花)
- **Gender:** Female
- **Subject of:** Confinement, Pre-Story Death
- **Personality:** Money Lover
- **Role:** Younger Sister

### Sakura Tetsuo (佐倉 鉄男)
- **Gender:** Male
- **Personality:** Ore, Strict, Serious, Brave
- **Engages in:** Time Travel
- **Subject of:** Homicide

## Shops
- [Official Website](https://mmparadox.com/)
- [Steam](https://store.steampowered.com/app/2203040/)

## Releases
### Japanese
- **2023-10-09**: Murder Mystery Paradox - Kono Hitonatsu no Juugonen Demo - [Official website](https://mmparadox.com/), [Steam](https://store.steampowered.com/app/2482410/), [SteamDB](https://steamdb.info/app/2482410/info/)
- **2023-12-02**: Murder Mystery Paradox - Kono Hitonatsu no Juugonen - [Official website](https://mmparadox.com/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=37112), [Steam](https://store.steampowered.com/app/2203040/), [SteamDB](https://steamdb.info/app/2203040/info/)

### Chinese (simplified)
- **2024-05-02**: Youyou Yixia Shiwu Zai Mosha Mi'an Beilun - [Official website](https://github.com/Qi-Busiyi-Hanhuazu/MurderMysteryParadoxChsLocalization)

## Tags
Murder Mystery, No Sexual Content, Time Travel, Bad Endings with Story, Proactive Protagonist, One True End, Protagonist with a Face, Male Protagonist, Orphan Protagonist, Homicide, Family, Revenge, Island, Protagonist with a Sprite, Fictional Modern Day Japanese Countryside, Life and Death Drama, Battle of Wits, More Than Seven Endings, Confinement, Courtroom

## More Games from 213℉
- [Murder Mystery Paradox - Kono Hitonatsu no Juugonen](https://pinovel.net/v44202)

---
*View the full details at [pinovel.net/v44202](https://pinovel.net/v44202).*

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