---
title: "Kousai Toshi"
description: "In the near future, where eyes have been mechanized to perceive augmented reality (AR) indistinguishably from reality, there exists a city known as 'District Ze"
image: "https://t.vndb.org/cv/01/117601.jpg"
---

# Kousai Toshi

![Kousai Toshi](https://t.vndb.org/cv/01/117601.jpg)

**Alternative Title:** 虹彩都市

**Aliases:** augment protocol, Iris City

**Developer:** Key

**Release date:** Nov 28, 2025

**Platform:** Windows

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

**Rating:** 7.1/10 (46 votes)

## Description
In the near future, where eyes have been mechanized to perceive augmented reality (AR) indistinguishably from reality, there exists a city known as 'District Zero'. In this fully AR-compatible city, residents not only enjoy a prosperous life and stimulating entertainment but also benefit from the management of their visual experiences by the AR network called 'ADONIS' making it touted as the safest city in the world.

Within District Zero, the protagonist, Kurauki Shion, works as a first-class investigator for the ADONIS corporation, safeguarding the city from potential threats. However, after becoming entangled in a conspiracy surrounding the 'Swampman Incident' he was assigned to investigate, Shion is demoted to a sinecure position at the OCTA branch.

Amidst the despair, Shion encounters a peculiar situation where his childhood sweetheart Moka, presumed to have died in childhood, appears before him in the form of a child on the AR platform. She exists as an electronic ghost with no physical presence in the real world.

## Characters
### Kuraugi Shion (喰木 紫苑)
A first-class investigator with ADONIS' Cybercrime Division 1, working on the front lines to combat serious cybersecurity incidents brought about by the spread of "Plant."
Although he's quiet, uncooperative, and often acts on his own, he boasts a top-class case-solving rate.
However, after becoming embroiled in an incident involving a mysterious piece of hardware called "Cheat Plant," he is demoted to "OCTA," a dead-end position.

- **Gender:** Male
- **Traits:** 
- **Voiced by:** Itou Kento

### Crossandra Summercandle (クロサンドラ サマーキャンドル)
A member of the OCTA branch. Everyone calls her "Sandra."
She has a unique way of speaking because she learned the language from anime.
She's not good at desk work, but she's unusually strong physically.

- **Gender:** Female
- **Aliases:** サンドラ, Sandra
- **Hair:** Pink
- **Personality:** Otaku
- **Voiced by:** Yuasa Kaede

### Ichige Moka (一華 百花)
A girl whom Kuuki played with when he was a child.
Despite the news that she had passed away from illness, Moka appears before Kuraugi as an AR avatar.
Kuraugi has almost no memory of the past, so she suggests that they create a flower garden together to remember his memories.

- **Gender:** Female
- **Hair:** White, Ahoge
- **Eyes:** Blue, Red, Heterochromia
- **Voiced by:** Terasawa Momoka

### Otohara Rurino (乙原 瑠璃乃)
A rookie investigator at ADONIS Cybercrime Division 1.
She deeply respects his senior investigator Kuraugi, and constantly tries to get his attention.
In the case involving ‘Cheat Plant’, she partners with Kuraugi to conduct the investigation.

- **Gender:** Female
- **Hair:** Ahoge
- **Role:** Kouhai
- **Voiced by:** Oowada Hitomi

### Shakuyaku Nene (芍薬 根々)
One of the investigators attached to the OCTA branch.
As a hikkikomori, he always comes to work using an AR avatar.
Nene was originally a skilled cracker, and his skills were recognized when he was scouted by ADONIS.

- **Gender:** Male
- **Hair:** Black
- **Engages in:** Cross-dressing
- **Personality:** Boku, Genius
- **Clothes:** Hoodie, Headphones
- **Role:** Hikikomori
- **Body:** Androgynous
- **Voiced by:** Matsumoto Sara

### Susukino Obana (薄野 尾花)
The head of the OCTA branch where Kuraugi was demoted.
Despite being the head of the branch, she has a lackadaisical attitude towards work and is often seen taking naps on the sofa at work or playing with local amateur baseball teams under the guise of patrols.

- **Gender:** Female
- **Hair:** Blond, Ponytail
- **Eyes:** Amber
- **Voiced by:** Marika

### Daffodil (ダフォデイル)
A top executive at ADONIS.
He appears as an incorporeal AR avatar that looks like a cat.
Normally, he's not in a position to talk to Kugi, who is just an investigator, but he notices Kugi's talent when he was a boy and recruits him to ADONIS, so he keeps an eye on him.

- **Gender:** Male
- **Traits:** 
- **Voiced by:** Kuroda Takaya

### Young Man (青年)
A mysterious young man who confronts Kuraugi, who was investigating the "Cheat Plants".
He distributes hardware called "Cheat Plants" that can disable ADONIS' security, but his purpose is unknown.

- **Gender:** Male
- **Traits:** 
- **Voiced by:** Kawanishi Kengo

## Shops
- [Official Website](https://www.prot.co.jp/switch/augment_protocol/index.html)
- [DLsite](https://www.dlsite.com/soft/work/=/product_id/VJ01005086.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=1340855)

## Releases
### Japanese
- **2025-11-11**: Kousai Toshi - Trial Edition - [Official website](https://key.visualarts.gr.jp/kinetic/augment_protocol/)
- **2025-11-28**: Kousai Toshi - First Press Limited Edition - [Official website](https://key.visualarts.gr.jp/kinetic/augment_protocol/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=35617), [Melonbooks.co.jp](https://www.melonbooks.co.jp/detail/detail.php?product_id=3105752), [Getchu](http://www.getchu.com/soft.phtml?id=1340855), [DMM](https://www.dmm.co.jp/mono/pcgame/-/detail/=/cid=1041apc14855/)
- **2025-11-28**: Kousai Toshi - Download Edition - [Official website](https://key.visualarts.gr.jp/kinetic/augment_protocol/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=35617), [DLsite](https://www.dlsite.com/soft/work/=/product_id/VJ01005086.html), [DMM](https://dlsoft.dmm.com/detail/vsat_0328/)
- **2025-11-28**: Kousai Toshi - Early Reservation Deluxe Limited Edition - [Official website](https://key.visualarts.gr.jp/kinetic/augment_protocol/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=35617)
- **2026-10-01**: Kousai Toshi - Download Edition - [Official website](https://www.prot.co.jp/switch/augment_protocol/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=40465)
- **2026-10-01**: Kousai Toshi - Regular Edition - [Official website](https://www.prot.co.jp/switch/augment_protocol/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=40465)
- **2026-10-01**: Kousai Toshi - First Press Limited Edition - [Official website](https://www.prot.co.jp/switch/augment_protocol/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=40465)

### Chinese (simplified)
- **2025-12-30**: Hongcai Dushi - [Official website](https://2dfan.com/downloads/40815)
- **2026-02-10**: Hongcai Dushi - [Official website](https://bbs2.kdays.net/read/97195)

### Chinese (traditional)
- **2025-12-30**: Hongcai Dushi - [Official website](https://2dfan.com/downloads/40815)

### Vietnamese
- **TBA**: Đô thị hồng mạc - [Official website](https://vnkeyfc.github.io/)

## Tags
Male Protagonist, Kinetic Novel, Science Fiction, High Amount of Special Effects, Virtual Reality, Co-worker Support Character, Brief NVL Scenes, Protagonist with Voice Acting, Adult Protagonist, Childhood Promise, Future Setting in a Fictional World, Insert Songs, Nakige, Loli Heroine, Completely Unavoidable Heroine Death, Detective Work, Police Officer Protagonist, Trap Support Character

## More Games from Key
- [Kanon](https://pinovel.net/v33)
- [AIR](https://pinovel.net/v36)
- [CLANNAD](https://pinovel.net/v4)
- [planetarian ~Chiisana Hoshi no Yume~](https://pinovel.net/v34)
- [Tomoyo After ~It's a Wonderful Life~](https://pinovel.net/v12)
- [Little Busters!](https://pinovel.net/v5)
- [CLANNAD - Hikari Mimamoru Sakamichi de](https://pinovel.net/v4060)
- [Kud Wafter](https://pinovel.net/v3079)
- [Rewrite](https://pinovel.net/v751)
- [Rewrite Harvest festa!](https://pinovel.net/v8020)
- [Little Busters! SS](https://pinovel.net/v11567)
- [Nishizono Mio Misshitsu Satsujin Jiken?](https://pinovel.net/v19693)
- [Angel Beats! -1st beat-](https://pinovel.net/v13774)
- [Harmonia](https://pinovel.net/v16510)
- [Rewrite: Oka-ken Katsudou Kiroku Gaiden](https://pinovel.net/v19611)
- [Rewrite: Cradles Tale](https://pinovel.net/v21644)
- [Summer Pockets](https://pinovel.net/v20424)
- [LOOPERS](https://pinovel.net/v29445)
- [planetarian ~Snow Globe~](https://pinovel.net/v27747)
- [LUNARiA -Virtualized Moonchild-](https://pinovel.net/v29444)
- [Tsui no Stella](https://pinovel.net/v29443)
- [Prima Doll: Fuyuzora Hanabi / Sekka Mon'you](https://pinovel.net/v29761)
- [Prima Doll: Mumei Tenrei](https://pinovel.net/v49954)
- [Kousai Toshi](https://pinovel.net/v48532)
- [anemoi](https://pinovel.net/v47937)
- [Prima Doll: Kouto Tantei](https://pinovel.net/v49956)
- [Prima Doll Encore](https://pinovel.net/v49957)

---
*View the full details at [pinovel.net/v48532](https://pinovel.net/v48532).*

```json
{"@context":"https://schema.org","@type":"VideoGame","@id":"https://pinovel.net/v48532#game","name":"Kousai Toshi","description":"In the near future, where eyes have been mechanized to perceive augmented reality (AR) indistinguishably from reality, there exists a city known as 'District Ze","url":"https://pinovel.net/v48532","image":"https://t.vndb.org/cv/01/117601.jpg","author":{"@type":"Organization","name":"Key"},"aggregateRating":{"@type":"AggregateRating","ratingValue":"7.1","bestRating":10,"worstRating":1,"ratingCount":46}}
```