---
title: "Mystereet ~Fukagyaku Sekai no Tantei Shinshi~"
description: "Become Yasogami Kaoru, the youngest class A detective in IDLA, an international detective organization, and solve difficult cases that baffle veteran policemen."
image: "https://t.vndb.org/cv/54/98054.jpg"
---

# Mystereet ~Fukagyaku Sekai no Tantei Shinshi~

![Mystereet ~Fukagyaku Sekai no Tantei Shinshi~](https://t.vndb.org/cv/54/98054.jpg)

**Alternative Title:** ミステリート～不可逆世界の探偵紳士～

**Developer:** Abel Software / Abel Inc. / Asada Products

**Release date:** May 28, 2004

**Platform:** Windows, PSP, PS2, PS4, Switch, XXS

**Language:** Japanese

**Rating:** 6.8/10 (14 votes)

## Description
Become Yasogami Kaoru, the youngest class A detective in IDLA, an international detective organization, and solve difficult cases that baffle veteran policemen. Although the game is split into episodes, the plot lines are interconnected and the web of relationships are so intricate that it is a real challenge to find the culprit and his or her motives.

The game is split into four episodes and a prologue. The prologue demonstrates the prowess of the youngest class A detective in action as he solves a murder case on a cruise ship. The main storyline starts at the first episode where Kaoru accepts a case from IDLA's Director Connor, to locate the legendary detective Agyou Sohma who disappeared. To solve the case, Kaoru masqueraded as a class D detective and entered Sohma's Shiawase Detective Agency. To make matters even more complicated, Shiawase Detective Agency has a accepted a case from a Mrs. Toudou to catch the mysterious thief Sapphire.

After solving Mrs. Toudou case, Kaoru, still in disguise, is given another case to solve in episode two, he is to find out the truth behind the mysterious fire that burnt people to death in the local church, and at the same time, figure out the cryptic message the pastor left before his own death. In episode three, Kaoru receives a challenge from another class A detective, to find out a murderer amongst five hypnotized persons.

The grand final of this game lies in the last episode. Class A detectives from all over the world are invited to Baron Kazamatsuri's deserted mansion to solve a foretold murder case. Sohma Agioh name is in the list and old foes like the mysterious bandit Sapphire shows up. Can Kaoru solve, or even prevent the murder case and find Agyou Sohma in this grand finale?

[From [Play-Asia](http://www.play-asia.com/paOS-13-71-9f-49-en-70-2l54.html)]

## Characters
### Yasogami Kaoru (八十神 かおる)
A highly skilled detective who is of british nationality. He has already graduated from Oxford University with advanced placement.

- **Gender:** Male
- **Measurements:** Height: 175cm
- **Hair:** Brown, Short, Spiky
- **Engages in:** Cross-dressing, Investigation
- **Body:** Teen, Pale
- **Eyes:** Blue
- **Clothes:** Suit, Glasses, Gloves
- **Personality:** Ore, Opposite Gender Voiced
- **Role:** Detective, British
- **Items:** Smoking Pipe
- **Voiced by:** Ogata Megumi

### Mainokouji Mikage (舞ノ小路 水陰)
- **Gender:** Female
- **Measurements:** Height: 150cm
- **Hair:** Black, Ponytail, Hime Cut, Curtained, Straight, Blunt Bangs, Parted in Middle, Sidehair
- **Body:** Slim, Pale, Kid, Younger Appearance
- **Eyes:** Green
- **Clothes:** Kimono, Hakama, Clothing with Ribbons, Ribbon Hair Accessory, Ribbon Hair Tie, Fingerless Gloves
- **Personality:** Refined, Genius, Insightful, Wise, Observant
- **Role:** Detective, Yamato Nadeshiko
- **Items:** Umbrella
- **Voiced by:** Ogura Yui

### Marta Algereach (マルタ・アルゲリーチ)
An up and coming treasure hunter who has recently reared her head. In contrast to her chosen profession, she is not especially attached to money and does not appear to be very aware of the stigma of being a treasure hunter.

It seems that in her past somewhere lies a connection with Kasumi.

[Edited from Hirameki International]

- **Gender:** Female
- **Measurements:** Height: 165cm, Bust-Waist-Hips: 84-56-80cm
- **Hair:** Blond, Antenna, Curtained, Short
- **Eyes:** Blue
- **Clothes:** Vest, Tank Top, Dog Tags, Fingerless Gloves, Short Shorts
- **Personality:** Ignorant, Funny, Kansai-ben, Serious, Mysterious
- **Role:** Criminal, French
- **Body:** Nail Polish
- **Voiced by:** Yukino Satsuki

### Nanao Serina (七尾 芹奈)
- **Gender:** Female
- **Measurements:** Height: 158cm, Bust-Waist-Hips: 84-56-80cm
- **Hair:** Brown, Shoulder-length, Parted to Side
- **Body:** Teen, Slim, Pale
- **Role:** Orphan, Friend, Coworker, Detective, Secretary, Yamato Nadeshiko, Japanese (Expatriate)
- **Eyes:** Green, Tareme
- **Clothes:** Vest, Miniskirt, Hairpin
- **Personality:** Deredere, Honorable, Refined, Loyal, Atashi, Humble
- **Subject of:** Disappearance
- **Voiced by:** Motoi Emi

### Nanjou Miyuki (南条 深雪)
- **Gender:** Female
- **Measurements:** Height: 162cm, Bust-Waist-Hips: 85-58-82cm
- **Hair:** Red, Antenna, Ponytail, Waist Length+
- **Role:** Ex-girlfriend, Ane Act, Detective
- **Eyes:** Green
- **Personality:** Assertive, Obedient, Deredere, Idiot, Cheerful, Friendly, Kind, Stubborn, Smart, Proactive, Confident, Mature
- **Clothes:** Mini-dress, Jacket, Large Hoop Earrings
- **Voiced by:** Mitsuishi Kotono

### Amakusa Yuna (天草 由那)
- **Gender:** Female
- **Hair:** Shoulder-length, Green
- **Eyes:** Green
- **Role:** Maid
- **Clothes:** Maid's Dress, Maid's Headdress
- **Voiced by:** Ichimura Oma

### Ayanokouji (綾小路)
- **Gender:** Male
- **Hair:** Short, Grey
- **Eyes:** Brown
- **Clothes:** Suit, Gloves, Bow Tie
- **Items:** Walking Stick
- **Voiced by:** Shinomiya Gou

### Azabu Yuuki (麻布優希)
- **Gender:** Female
- **Eyes:** Violet
- **Body:** Young-adult, Pale
- **Clothes:** Decorative Belt, Necktie, Over The Knee Socks, Beret, Tank Top
- **Hair:** Short, Black
- **Role:** Thief
- **Items:** Bag
- **Voiced by:** Kusayanagi Junko

### Azuma Nishi (東 西)
- **Gender:** Male
- **Measurements:** Height: 183cm
- **Hair:** Blond, Curtained, Short
- **Eyes:** Blue, Hosome
- **Clothes:** Suit, Necktie, Belt, Formal Shirt
- **Personality:** Deredere, Arrogant, Refined, Kind, Honest, Womanizer
- **Role:** Ex-boyfriend
- **Voiced by:** Kawada Shinji

### Busujima Takeo (毒島 武雄)
- **Gender:** Male
- **Clothes:** Flower, Vest, Trousers
- **Hair:** Thick Eyebrows, Parted in Middle, Wavy, Arm Hair, Green
- **Body:** Ugly, Overweight, Wrinkles
- **Eyes:** Sanpaku Eyes
- **Voiced by:** Sonobe Yoshinori

### Chen (チェン)
- **Gender:** Female
- **Hair:** Shoulder-length, Green, Eye Covering, Parted to Side
- **Clothes:** Uniform, Necktie, Gloves, Miniskirt, Peaked Cap
- **Eyes:** Violet
- **Role:** Security Guard
- **Voiced by:** Yukana

### Director Conner (コナー局長)
- **Gender:** Male
- **Hair:** Black, Short, Moustache, Goatee
- **Clothes:** Fedora, Suit, Necktie
- **Eyes:** Blue
- **Voiced by:** Ozaki Jun

### Doujima Kanae (堂島 香苗)
- **Gender:** Female
- **Hair:** Shoulder-length, Claret
- **Clothes:** Earrings, Necklace, Skirt Suit
- **Body:** Mole
- **Eyes:** Itome
- **Voiced by:** Yukana

### Doujima Ranko (堂島 蘭子)
- **Gender:** Female
- **Hair:** Blond, Odango, Waist Length+, Wavy
- **Body:** Kid
- **Clothes:** Dress, Ribbon Hair Tie
- **Eyes:** Pink
- **Voiced by:** Iijima Kyouko

### Doujima Tetsuo (堂島 哲夫)
- **Gender:** Male
- **Hair:** Brown, Short, Thick Eyebrows, Slicked Back
- **Clothes:** Trousers, Necktie, Vest, Formal Shirt
- **Personality:** Proactive, Strange, Flamboyant, Japanese Dialect
- **Eyes:** Black, Hosome
- **Body:** Adult, Overweight, Wrinkles
- **Role:** Husband, Father
- **Voiced by:** Sonobe Yoshinori

### Fina (フィーナ)
- **Gender:** Female
- **Alias:** Emily
- **Measurements:** Height: 140cm
- **Hair:** Blond, Waist Length+, Ringlet
- **Body:** Slim, Pale, Kid
- **Eyes:** Amber, Tareme
- **Clothes:** Dress, Gothic, Lolita, Clothing with Ribbons, Ribbon Hair Accessory
- **Role:** Criminal, Gang Leader, Antivillain
- **Personality:** Honorable, Vindictive
- **Voiced by:** Iijima Kyouko

### Fujidou Aki (藤堂 亜紀)
- **Gender:** Female
- **Hair:** Brown, Ponytail, Long
- **Eyes:** Brown
- **Clothes:** Lab Coat, Blouse, Ribbon Hair Tie, Name Tag, Pleated Skirt
- **Voiced by:** Yukino Satsuki

### Hikawa Mai (氷川 マイ)
- **Gender:** Female
- **Measurements:** Height: 162cm, Bust-Waist-Hips: 88-58-85cm
- **Hair:** Blue, Antenna, Twin Tails, Waist Length+
- **Body:** Pale, Scar
- **Role:** Orphan, Criminal, Assassin
- **Eyes:** Red
- **Clothes:** Half-Skirt, Thigh-high Stockings, Sundress
- **Engages in:** Martial Arts
- **Personality:** Cold-hearted, Loyal
- **Voiced by:** Yukana

### Hoshino Megumi (星野 恵)
- **Gender:** Female
- **Hair:** Long, Orange
- **Eyes:** Violet
- **Clothes:** Cross Necklace, Habit, Guimpe
- **Role:** Christian Nun
- **Voiced by:** Hyo-sei

### Kamo Ebizou (加茂 海老蔵)
- **Gender:** Male
- **Hair:** Brown, Short
- **Clothes:** Trousers, Shirt, Lab Coat, Name Tag
- **Eyes:** Green

### Kisaragi Toshirou (如月 俊郎)
- **Gender:** Male
- **Hair:** Ponytail, Long, Cyan
- **Eyes:** Violet
- **Clothes:** Suit, Turtleneck Shirt

### Miranda El Child (ミランダ・エル・チャイルド)
- **Gender:** Female
- **Hair:** Blond, Waist Length+, Wavy
- **Eyes:** Blue
- **Body:** Nail Polish
- **Clothes:** Decorative Belt, Choker, Slit Dress
- **Voiced by:** Iijima Kyouko

### Sapphire Thief (怪盗サファイア)
- **Gender:** Female
- **Alias:** Phantom Thief No. 9900
- **Personality:** Mysterious, Honorable
- **Eyes:** Violet
- **Body:** Young-adult, Pale
- **Clothes:** Evening Gloves, Skirt, Sleeveless Leotard, Blindfold
- **Hair:** Short, Black
- **Role:** Thief
- **Voiced by:** Kusayanagi Junko

### Sawada Keitarou (沢田 軽太郎)
- **Gender:** Male
- **Measurements:** Height: 178cm
- **Hair:** Brown, Long, Side Tail
- **Eyes:** Brown, Hosome
- **Clothes:** Jeans, Hoodie, Hair Tie
- **Personality:** Idiot, Friendly, Kind, Naive, Talkative
- **Role:** Teacher, Detective
- **Voiced by:** Mori Norihisa

### Shindou Maika (真道 マイカ)
- **Gender:** Female
- **Hair:** Brown
- **Eyes:** Brown
- **Clothes:** Earrings, Necklace, Gloves, Strapless Dress, Sun Hat
- **Items:** Handbag
- **Voiced by:** Hyo-sei

### Suzuki Shigemitsu (鈴木 重光)
- **Gender:** Male
- **Hair:** Shoulder-length, Moustache, Grey
- **Clothes:** Gloves, Monocle, Bow Tie, Tailcoat
- **Role:** Butler
- **Body:** Wrinkles

### Todoroki Mamoru (轟木 守)
- **Gender:** Male
- **Hair:** Black, Short
- **Clothes:** Suit, Necktie
- **Voiced by:** Ozaki Jun

### Yamaoka Shizuka (山岡 静)
- **Gender:** Female
- **Hair:** Brown, Shoulder-length
- **Eyes:** Brown
- **Clothes:** Earrings, Glasses, Miniskirt, Belt, Blazer
- **Voiced by:** Iijima Kyouko

### Yamizuka Yahei (闇塚 弥平)
- **Gender:** Male
- **Hair:** Brown, Short, Moustache, Parted to Side
- **Clothes:** Suit, Necktie, Gloves
- **Items:** Cigar
- **Voiced by:** Sonobe Yoshinori

### Yurihara Rei (百合原 玲)
- **Gender:** Female
- **Hair:** Violet, Long
- **Clothes:** School Uniform, Sailor School Uniform
- **Eyes:** Red
- **Voiced by:** Ichimura Oma

### Yurihara Shuu (百合原 修)
- **Gender:** Male
- **Hair:** Violet, Short
- **Clothes:** Glasses, Cross Necklace, Gloves, Collarino
- **Eyes:** Itome
- **Role:** Christian Priest

### Agyou Souma (悪行 双麻)
He is a Class A detective. He is very good at deducing the situation of the case, even with little bit of information. He doesn't smoke, but he keeps the best cigarette in his pocket and plans to smoke it when he is about to die.

[taken from [url=http://www.gamefaqs.com/console/dreamcast/review/R23645.html]GameFAQs review[/url]]

- **Gender:** Male
- **Hair:** Short, Green, Eye Covering
- **Body:** Pale
- **Clothes:** Fedora, Trench Coat, Suit, Turtleneck Shirt
- **Role:** Detective
- **Engages in:** Investigation
- **Voiced by:** Koyasu Takehito

### Cliff McDougall (クライフ・マクドガル)
Class A detective from Northern Ireland.

Does not carry any weapons, but uses martial arts handed down from ancient Celtic Ireland.

- **Gender:** Male
- **Hair:** Short, Spiky, Claret, Short Bangs
- **Body:** Pale, Young-adult
- **Engages in:** Martial Arts, Unarmed Fighting
- **Role:** Detective, Irish
- **Clothes:** Choker, Fur Trim

### Justice 'George Spencer' Fittsuaran (ジャスティス・（ジョージ・スペンサー）・フィッツアラン)
The world's best detective with the idler license of (double-A) AA only one in the world. 

Also carries two handguns named "JUSTICE" and "JUDGEMENT"

- **Gender:** Male
- **Hair:** White, Waist Length+
- **Eyes:** Green
- **Clothes:** Jacket, Cross Necklace, Belt
- **Items:** Handgun
- **Role:** Detective, British

## Shops
- [Official Website](http://www.abelsoftware-jp.com/product/mst.html)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ004933.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=756339)

## Releases
### Japanese
- **2004-05-28**: Mystereet ~Fukagyaku Sekai no Tantei Shinshi~ DVD-ROM Edition - [Official website](http://www.abelsoftware-jp.com/product/mst.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=3539), [Getchu](http://www.getchu.com/soft.phtml?id=32368)
- **2004-05-28**: Tantei Shinshi Super Value Pack - DVD-ROM - [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=3539), [Getchu](http://www.getchu.com/soft.phtml?id=55161)
- **2004-08-20**: Mystereet ~Fukagyaku Sekai no Tantei Shinshi~ CD-ROM Edition - [Official website](http://www.abelsoftware-jp.com/product/mst.html), [Getchu](http://www.getchu.com/soft.phtml?id=88421)
- **2004-08-20**: Tantei Shinshi Super Value Pack - CD-ROM - [Getchu](http://www.getchu.com/soft.phtml?id=88441)
- **2006-05-25**: Mystereet ~Yasogami Kaoru no Chousen!~ - [Official website](http://www.abel-jp.com/products/mcps/myst-hp/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=7378), [PlayAsia](https://www.play-asia.com/13/7019kn)
- **2006-05-25**: Mystereet ~Yasogami Kaoru no Chousen!~ First Press Limited Edition - [Official website](http://www.abel-jp.com/products/mcps/myst-hp/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=7378), [PlayAsia](https://www.play-asia.com/13/7019ko)
- **2006-05-25**: Mystereet ~Fukagyaku Sekai no Tantei Shinshi~ Special Pack - [Official website](http://www.abelsoftware-jp.com/product/mstpack.html), [Getchu](http://www.getchu.com/soft.phtml?id=254125)
- **2008-04-24**: Mystereet Portable ~Yasogami Kaoru no Chousen~ - [Official website](http://www.abel-jp.com/products/mystereetPSP/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=10457), [PlayAsia](https://www.play-asia.com/13/702l54)
- **2008-10-31**: Mystereet Windows ~Yasogami Kaoru no Chousen!~ - [Official website](http://www.abel-jp.com/products/mc_win/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=11521), [Getchu](http://www.getchu.com/soft.phtml?id=583665)
- **2010-07-30**: Mystereet ~Fukagyaku Sekai no Tantei Shinshi~ Download Edition - [Official website](http://www.abelsoftware-jp.com/product/mst.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=3539), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ004933.html), [Gyutto](https://gyutto.com/i/item41256), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0043987/)
- **2012-10-26**: Mystereet ~Fukagyaku Sekai no Tantei Shinshi~ Price Revised Edition
- **2013-01-18**: Kanno Hiroyuki Memorial - [Official website](http://www.abelsoftware-jp.com/product/km/index.html), [Getchu](http://www.getchu.com/soft.phtml?id=756339), [DMM](https://dlsoft.dmm.co.jp/detail/cdb_0295/)
- **2025-07-30**: Mystereet ~Yasogami Kaoru no Chousen!~ - [Official website](http://mystereet-f.jp/), [PlayStation Store (NA)](https://store.playstation.com/en-us/product/UP0745-CUSA53889_00-0979370783170906)
- **2025-07-30**: Mystereet ~Yasogami Kaoru no Chousen!~ - [Official website](http://mystereet-f.jp/)
- **2025-07-30**: Mystereet ~Yasogami Kaoru no Chousen!~ - [Official website](http://mystereet-f.jp/), [Nintendo (JP)](https://store-jp.nintendo.com/item/software/D70010000095320)
- **TBA**: Mystereet ~Yasogami Kaoru no Chousen!~ - [Official website](http://mystereet-f.jp/)

## Tags
Action, Mystery, Sexual Content, ADV, NVL, Romance, Male Protagonist, Adult Protagonist, Modern Day, Drama, Murder Mystery, Map Movement, Detective Work, Brief NVL Scenes, Protagonist with Glasses, Photographic Backgrounds, Private Detective Protagonist, Branching Plot, Thief Heroine, Proactive Protagonist, Side Portraits, Silhouettes, Ship, Phantom Thieves, Protagonist with Voice Acting

## More Games from Abel Software / Abel Inc. / Asada Products
- [Fukakutei Sekai no Tantei Shinshi](https://pinovel.net/v2389)
- [Card of Destiny](https://pinovel.net/v7495)
- [Mystereet ~Fukagyaku Sekai no Tantei Shinshi~](https://pinovel.net/v1267)
- [Juujigen Rippoutai Cipher ~Aoki Tsuki no Suitei~](https://pinovel.net/v4147)
- [Mystereet ~Other Side of Church~](https://pinovel.net/v1038)
- [MQ ~Jikuu no Hasha~](https://pinovel.net/v1995)
- [Koitou Ranma ~Watashi ga, Anata o, Mamoru Kara!!!~](https://pinovel.net/v3297)
- [Dual M -Sora no Kioku-](https://pinovel.net/v3991)
- [Moekoi Ishin! ~Atashira, JK, Shinsengumi!~](https://pinovel.net/v5124)
- [Marumeru ~Soushinsha wa @ Mirai~](https://pinovel.net/v5411)
- [Zombie no Doukyuusei wa Princess -Fushibito Detective-](https://pinovel.net/v7239)
- [Fujouri Sekai no Tantei Reijou ~Himitsu no Teatime wa Hanazono de~](https://pinovel.net/v16084)
- [Apparition ~Saigo no Hatsukoi wa Bad End~](https://pinovel.net/v20180)
- [Exodus Guilty](https://pinovel.net/v172)
- [Fukakutei Sekai no Tantei Shinshi](https://pinovel.net/v2389)
- [Card of Destiny](https://pinovel.net/v7495)
- [Mystereet ~Fukagyaku Sekai no Tantei Shinshi~](https://pinovel.net/v1267)
- [Juujigen Rippoutai Cipher ~Aoki Tsuki no Suitei~](https://pinovel.net/v4147)
- [School Love! ~Soyokaze no Harmony~](https://pinovel.net/v5721)
- [Mystereet ~Detective Vacation~](https://pinovel.net/v6222)

---
*View the full details at [pinovel.net/v1267](https://pinovel.net/v1267).*

```json
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```