---
title: "Aikotoba"
description: "\"Aikotoba\", a popular matchmaking app with a feature of \"finding your fated partner\".   The protagonist, Mizukami Takumi, is an office worker with a stable job."
image: "https://t.vndb.org/cv/23/89223.jpg"
---

# Aikotoba

![Aikotoba](https://t.vndb.org/cv/23/89223.jpg)

**Alternative Title:** アイコトバ

**Aliases:** Secret word

**Developer:** Azarashi Soft+1

**Release date:** Dec 20, 2019

**Platform:** Windows, Android

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

**Rating:** 7.2/10 (208 votes)

## Description
"Aikotoba", a popular matchmaking app with a feature of "finding your fated partner". 

The protagonist, Mizukami Takumi, is an office worker with a stable job. One day, he is recommended by his colleague to try the app. Through it, he meets a girl called “Yozora” with compatibility of 99% and gradually become closer each day.

Coincidentally, Takumi is being sent for business trip to Sendai, the city of where the girl is. As a result, they decide to meet up in real life and arrange a meeting there.
 
However, when the time comes, he wouldn’t believe what he sees.

“…Onii…chan?”

Under the cold sky of Sendai, Takumi didn’t expect to meet “her”… his younger sister, Uzuki, who he hasn’t see in seven years. Moreover, she is the girl under the alias “Yozora” all this time, the girl in the app who made him fall in love.

## Characters
### Mizukami Takumi (水上 拓未)
- **Gender:** Male
- **Alias:** タクミ
- **Hair:** Black, Short, Straight
- **Body:** Pale, Adult
- **Personality:** Hard Worker, Kind
- **Role:** Orphan, Full Brother, Older Brother, Office Worker
- **Clothes:** Suit
- **Items:** Mobile Phone
- **Engages in:** Marriage Proposal

### Kinoshita Uzuki (木下 卯月)
The protagonist, Takumi Mizukami's, imouto who adores her onii-chan. After losing both their parents in a disaster, due to adult circumstances, they were separated half-way through their upbringing. She lives in Sendai. 

Even after being separated, she never forgets about her onii-chan and constantly brags about how stoic but kind he is. Despite being a natural beauty, she has not had any relationships with the opposite sex due to setting her onii-chan as her standard. Due to this, her friends tease her for having a brother complex.

One day while browsing the Aikotoba app, she stumbles across a user with the alias "Takumi" who she has a "99% compatibility score" with. Using the alias "Yozora", she takes a gamble on destiny and slides into his DMs. Their communications carry on until one day, "Takumi" tells her that he'll be in Sendai for business. Seizing the opportunity, she proposes the two should meet up.

After 7 years of harboring her feelings of adoration for onii-chan, her adoration escalates into a passionate love. As she begins to pursue her onii-chan more and more aggressively, worries surmount.

- **Gender:** Female
- **Aliases:** 夜空, Yozora
- **Measurements:** Height: 158cm, Bust-Waist-Hips: 86-55-87cm
- **Birthday:** 5 December
- **Hair:** Black, Waist Length+, Straight, Sidehair
- **Body:** Teen, Slim, Pale
- **Clothes:** Sweater, Pajamas, Scarf, Gloves, Miniskirt, Pantyhose, Bikini, Hairpin, Naked Apron, Pendant Necklace, Ribbon Tie, Pleated Skirt, Loafers, Blazer School Uniform
- **Role:** Orphan, Full Sister, Niece, Classmate, High School Student, Younger Sister, Part-time Worker, Secret Girlfriend
- **Engages in:** Cooking, Shopping, Daydreaming
- **Eyes:** Blue
- **Personality:** Pretending, Friendly, Brother Complex, Emotional, Watashi, Closet Pervert, Cheerful
- **Items:** Mobile Phone
- **Subject of:** Marriage Proposal
- **Voiced by:** Mihane Yuuki

## Shops
- [Official Website](http://azarashi-soft.nexton-net.jp/aikotoba/)
- [Getchu](http://www.getchu.com/soft.phtml?id=1074832)

## Releases
### Japanese
- **2019-10-25**: Aikotoba - Trial Edition - [Official website](http://azarashi-soft.nexton-net.jp/aikotoba/download/)
- **2019-12-20**: Aikotoba - Package Edition - [Official website](http://azarashi-soft.nexton-net.jp/aikotoba/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=28646), [Getchu](http://www.getchu.com/soft.phtml?id=1074832)
- **2019-12-20**: Aikotoba - Download Edition - [Official website](http://azarashi-soft.nexton-net.jp/aikotoba/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=28646), [DMM](https://dlsoft.dmm.co.jp/detail/next_0272/)
- **2019-12-27**: Aikotoba - [Official website](https://azarashi-soft.nexton-net.jp/aikotoba/android.html)

### Chinese (simplified)
- **2019-11-12**: Miyu - Trial Edition - [Official website](https://bbs.9shenmi.com/read.php?tid=791452&sf=971)
- **2020-03-08**: Lian Yu - [Official website](https://tieba.baidu.com/p/6536461337)
- **2020-06-29**: Mi Yu
- **2021-01-01**: Miyu - [Official website](https://twitter.com/lvchachahui/status/1344907452274200576)

### Korean
- **2022-05-24**: Aikotoba - [Official website](https://arca.live/b/yuzusoft/50978582)

### Indonesian
- **2025-11-29**: Aikotoba - [Official website](https://alyappy.blogspot.com/2025/11/aikotoba-bahasa-indonesia.html)

## Tags
ADV, Blood-related Brother/Sister Incest, Brother/Sister Romance, Male Protagonist, Adult Protagonist, Protagonist's Sister as a Heroine, Only a Single Heroine, Other Perspectives, The Holiday Season, Defloration, Only Virgin Heroines, Winter, Missionary Position, Sixty-nine, Intercrural Sex, Naked Heroine with Apron, Only Good Endings, Cunnilingus, Destiny, Brocon Heroine, Doggy Style, Female Ejaculation, Reunion, Social Networking Service, Cowgirl, Bleep Censor, Only Protagonist's Sisters as Heroine(s), Standing Sex, Sitting Sex, Spoons, Mutual Masturbation, Family Feud, Censored Text, Sexual Fantasizing, Only Younger Heroines, Forbidden Love, Secret Romance, Single Handjob, Single Blowjob, Vaginal Masturbation, Vaginal Fingering, Protagonist's Full Sister as a Heroine, High School Student Heroine, Sex with Protagonist Only, Protagonist's Younger Sister as a Heroine, Only Blood-related Heroines

## More Games from Azarashi Soft+1
- [Aikotoba](https://pinovel.net/v26537)
- [One → Shota ← One](https://pinovel.net/v28877)
- [Uchi no Aruji wa Youkai no Joushiki o Shiranai](https://pinovel.net/v29246)
- [Makimura Hazuki no Koigatari](https://pinovel.net/v31432)
- [Boku to Kanojo no Kojin Lesson](https://pinovel.net/v32661)
- [Garudoma -Joshiryou no Kanrinin-](https://pinovel.net/v44106)
- [Aikotoba -Silver Snow Sister-](https://pinovel.net/v45247)
- [Garudoma -Joshiryou no Kanrinin- After](https://pinovel.net/v47549)
- [Boku to Kanojo no Kojin Lesson 2](https://pinovel.net/v47554)
- [Mugen no Tír na nÓg](https://pinovel.net/v51477)
- [Secret Dessin](https://pinovel.net/v55005)
- [Ama Nee -Osananajimi Onee-chan to no Echi Echi Amayakasare Dousei Seikatsu-](https://pinovel.net/v61163)
- [Karakoi Invitation](https://pinovel.net/v61212)
- [Futago no Koi wa Minukenai](https://pinovel.net/v61214)
- [MeiKura ~Zokusei Morisugi Maidroid to, Maketakunai Classmate no Gohoushi Seikatsu~](https://pinovel.net/v63659)
- [SakuLove Triangle](https://pinovel.net/v61215)

---
*View the full details at [pinovel.net/v26537](https://pinovel.net/v26537).*

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