---
title: "Ai Shimai IV Kuyashikute Kimochi Yokatta Nante Ienai"
description: "Kenji Nishiyama is a fat ugly man that wastes all his money with prostitutes. After losing his job, he decided to blackmail a married woman, Eriko, to start a s"
image: "https://t.vndb.org/cv/29/20929.jpg"
---

# Ai Shimai IV Kuyashikute Kimochi Yokatta Nante Ienai

![Ai Shimai IV Kuyashikute Kimochi Yokatta Nante Ienai](https://t.vndb.org/cv/29/20929.jpg)

**Alternative Title:** 愛姉妹IV 悔しくて気持ち良かったなんて言えない

**Developer:** SILKY'S

**Release date:** May 30, 2014

**Platform:** Windows

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

**Rating:** 7.7/10 (297 votes)

## Description
Kenji Nishiyama is a fat ugly man that wastes all his money with prostitutes. After losing his job, he decided to blackmail a married woman, Eriko, to start a secret sex life with him under the threat of showing her daughters a picture of her husband leaving love hotel with unknown girl.

Later on he tries to use pictures of Eriko to get her daughters too, but though it worked, relationships with them and the reasons they keep staying with him are very different from what he had expected.

## Characters
### Nishiyama Kenji (西山 健二)
Ugly and fat, a guy almost 30 years old. He was suddenly fired and now is unemployed.
Hobbies are having sex with prostitutes for satisfying his unequalled sex drive, watching TV and cleaning his room.
Has good muscles but is weak, dislikes fighting and always is on the bullied side as in school, as in society.
For such a good-for-nothing Kenji, can be the encounter with Eriko and her daughters his first big chance?

- **Gender:** Male
- **Hair:** Brown, Short
- **Eyes:** Hidden
- **Body:** Young-adult, Overweight, Olive, Ugly
- **Personality:** Boku, Pervert, Kind
- **Subject of:** Bullying
- **Role:** Unemployed, Unpopular
- **Engages in:** Blackmail, Netori (steals the SO), Drugging

### Fujimura Eriko (藤村 江利子)
A beautiful female doctor working in a big hospital.
Even though being almost 40 years old has a beautiful shining skin, and because of her plump, bouncy body is often the target of mischievous pranks by the patients.
Became a doctor while still young, had spended time in her smooth-sailing life in mutual love with the husband, but was blackmailed and raped by ugly guy Kenji.

- **Gender:** Female
- **Measurements:** Height: 158cm, Weight: 60kg, Bust-Waist-Hips: 99-64-95cm, I cup
- **Hair:** Brown, Shoulder-length, Straight, Pubic Hair
- **Body:** Slim, Pale, Adult, Huge Breasts
- **Personality:** Hard Worker, Serious
- **Eyes:** Amber
- **Clothes:** Earrings, Thigh-high Stockings, Skirt Suit, Sailor School Uniform, Open Cup Bra, Crotchless Panties
- **Subject of:** Blackmail, Pregnancy, Being Drugged, Pregnancy (by illegitimate partner), Netorare (they are the stolen SO)
- **Role:** Mother, Medical Doctor
- **Engages in:** Infidelity
- **Voiced by:** Itou Sara

### Fujimura Kiyomi (藤村 清美)
In contrast to her hot-blooded sister, is a serious and cool girl that loves to study.
It may seems she looks at things with composure, but in reality she often reacts absently.
Stubborn, with never pulling back once she decided to do something on the one side of her personality, and bursting into tears in confusion, once something exceeds her maximum level of understanding on the other side.
She believes in the lies of the protagonist that he is her mother's lover and, for breaking apart this relationship, sacrifices her own pure body...

- **Gender:** Female
- **Aliases:** みってぃ, Mitti
- **Measurements:** Height: 154cm, Weight: 42kg, Bust-Waist-Hips: 78-55-82cm, C cup
- **Hair:** Brown, Shoulder-length, Pubic Hair
- **Eyes:** Brown
- **Body:** Teen, Slim, Pale, Small Breasts
- **Clothes:** School Uniform, Glasses, Kemonomimi Headband, Pantyhose, Pet Collar, Inumimi Headband
- **Personality:** Reserved, Smart, Closet Pervert
- **Subject of:** Blackmail, Pregnancy, Netorare (they are the stolen SO)
- **Role:** Daughter, Girlfriend, High School Student, Bisexual
- **Engages in:** Cosplay
- **Voiced by:** Aoi Miu

### Fujimura Manami (藤村 愛美)
Breasts that sway only by walking, slender but well-built limbs.
No doubt that this impudent and radical behaviour, like hitting protagonist, Kenji, right into the face the second she first saw him, will urge every man to sexually train her.
While being such a violent person on the one side, she also has the other side of her personality, being capable of frankly accepting a partner...
Will Kenji's view of life dramatically change being caught in such a strong personality?

- **Gender:** Female
- **Measurements:** Height: 157cm, Weight: 49kg, Bust-Waist-Hips: 88-52-90cm, G cup
- **Hair:** Brown, Twin Tails, Waist Length+, Pubic Hair
- **Body:** Teen, Slim, Pale, Big Breasts
- **Clothes:** School Uniform, Thigh-high Stockings, Wedding Dress, Swimsuit
- **Personality:** Hotblooded, Carefree, Mischievous, Violent, Childishly Violent
- **Eyes:** Amber
- **Subject of:** Blackmail, Pregnancy, Being Drugged, Netorare (they are the stolen SO)
- **Role:** Daughter, High School Student
- **Engages in:** Wedding
- **Voiced by:** Nakano Shino

### Hasegawa Junko (長谷川 順子)
New teacher of arts in the school of the Fujimura sisters, her nickname is 'Pochako' (chubby girl).
Extremely bad at socializing, has the TV and clay as her friends.
A cringe woman that cannot read the atmosphere around her.
Junko does things at her own pace too much, she's already at the mercy of Kenji on their first meeting!?

- **Gender:** Female
- **Aliases:** ぽちゃ子, Pochako
- **Measurements:** Height: 160cm, Bust-Waist-Hips: 101-79-96cm, J cup
- **Hair:** Blond, Ponytail, Long, Wavy, Blunt Bangs
- **Body:** Slim, Pale, Young-adult, Big Breasts
- **Clothes:** School Uniform, Glasses, Sport Bloomers, Maid's Dress, Pendant Necklace, Ribbon Hair Tie, Fishnet Stockings, Maid's Headdress, Sailor School Uniform, Crotchless Fishnet Pantyhose
- **Personality:** Airhead, Idiot, Shy, Kind, Naive, Honest
- **Subject of:** Blackmail, Pregnancy, Marriage Proposal
- **Role:** Teacher, Ojousama
- **Engages in:** Cosplay, Lactation
- **Eyes:** Teal
- **Voiced by:** Harumura Sayuna

### Takamine Nanako (高峰 奈々子)
A naive girl who calls Kiyomi "Mitti".
Looks like carefree child with no hesitation in talking with strangers like Kenji, but indeed she is a frank rich girl who cares about her best friend Kiyomi.
She is interested in ecchi more than the sisters, so having relation with her once, allows continue it as one pleases?

- **Gender:** Female
- **Measurements:** Height: 134cm, Weight: 33kg, Bust-Waist-Hips: 68-52-70cm, A cup
- **Hair:** Twin Tails, Short, Ringlet, Grey, Spiky Bangs
- **Body:** Teen, Slim, Pale, Tanline, Small Breasts
- **Clothes:** School Uniform, Sundress, Sailor School Uniform
- **Eyes:** Violet
- **Personality:** Pervert, Third Person, Blunt
- **Subject of:** Pregnancy
- **Role:** High School Student, Bisexual, Ojousama
- **Voiced by:** Anzu Hana

### Fujimura Keisuke (藤村 佳祐)
Looks indecisive and timidly, and so he is.
Enclosured by wife and daughters with strong personality, with tears from his eyes, tries his best as house-husband.
There are great numbers of people feeling envious about his life with beautiful wife and daughters. But knowing the true state of affairs, everyone surely will feel compassion for this man.

- **Gender:** Male
- **Hair:** Short, Grey
- **Body:** Adult
- **Personality:** Boku, Timid
- **Role:** Husband, Father, Househusband
- **Engages in:** Infidelity
- **Eyes:** Itome
- **Subject of:** Infidelity, Netori (their SO is stolen), Sexual Dysfunction

## Shops
- [Official Website](http://www.silkys.jp/game/aisimai4/)

## Releases
### Japanese
- **2014-04-25**: Ai Shimai IV Kuyashikute Kimochi Yokatta Nante Ienai - Trial Edition - [Official website](http://www.silkys.jp/game/aisimai4/download.html)
- **2014-05-30**: Ai Shimai IV Kuyashikute Kimochi Yokatta Nante Ienai - Package Edition - [Official website](http://www.silkys.jp/game/aisimai4/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=20312)
- **2014-06-26**: Ai Shimai IV Kuyashikute Kimochi Yokatta Nante Ienai - Download Edition - [Official website](http://www.silkys.jp/game/aisimai4/), [DMM](https://dlsoft.dmm.co.jp/detail/silkys_0038/)

### Chinese (simplified)
- **2021-03-22**: Ai Jiemei IV Fei Zhai Meimeng - [Official website](https://2dfan.com/subjects/2416)

### English
- **2022**: Ai Shimai IV Kuyashikute Kimochi Yokatta Nante Ienai - [Official website](https://sugoivisualnovel.up.railway.app/vns/14826)
- **2026-05-09**: Ai Shimai IV Kuyashikute Kimochi Yokatta Nante Ienai - [Official website](https://htranslations.com/translation/ai-shimai-iv-kuyashikute-kimochi-yokatta-nante-ienai)

## Tags
ADV, Comedy, Kuudere Heroine, Male Protagonist, Adult Protagonist, Multiple Endings, Teacher Heroine, Heroine with Glasses, Nukige, Shy Heroine, High Sexual Content, Villainous Protagonist, Group Sex of One Male and Several Females, Group Sex of One Female and Several Males, Student Heroine, Early Sexual Content, Pregnancy, Pregnant Sex, Harem Ending, Heroine with Zettai Ryouiki, Heroine with Sexual Experience, Adult Heroine, Netori, Married Heroine, Breaking the Fourth Wall, Tsundere Heroine, Childishly Violent Heroine, Perverted Protagonist, Hotblooded Heroine, Medical Doctor Heroine, Blackmail, Rape with Blackmail, Protagonist with Sexual Experience, Vibrators, Condoms, Defloration, Sex in Public Places, Side Portraits, Exhibitionism, Heroine with Tights, No Common Sense Heroine, Twin Tail Heroine, Bad Endings with Story, Missionary Position, Sounds of Copulation, Hint Corner, Twin Blowjob, Long Sexual Scenes, Impregnation, Chubby Protagonist, Bukkake, Anilingus, Poor Protagonist, Erotic Spanking, Ugly Protagonist, Harem Ending with Theme, Consensual Group Sex of One Female and Several Males, Romancing a Family, Enema, Doggy Style, Female Ejaculation, Ejaculation Choice, Infidelity, Naked Sprites, Petplay, Heroine with Tan Lines, Threesome Ending, Sex with Sleepers, Anal Toys, Cowgirl, Reverse Cowgirl, Choices with 4 or More Options, Defloration During Common Route, Shimaidon Ending, Standing Sex, Butterfly, Piledriver, Rape Involving Drugs, Production of Pornography (Professional), Drunk Sex, Bathroom Sex, Mischievous Heroine, Love Hotel, Heroine's Mother as a Heroine, Kissing Scene, Heroine with Children, Piss Drinking, Heroine with Pubic Hair, Orgasm Denial, Perverted Heroine, Armpit Licking, Anal Fingering, Save Memo Function, Music Recollection, Threesome, Completely Avoidable Heroine Rape by Others, Body Smell Fetish, NEET Protagonist, Anal Plug Tail, Pissing on Others, Nursing Handjob, Children Ending, Pregnancy Good Ending, Pissing, Anal Sex, Non-twin Heroine Sisters, High School Student Heroine, Heroine with Huge Breasts, Heroine with Big Breasts, Heroine with Small Breasts (Non-Loli), Sex Scene Recollection

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---
*View the full details at [pinovel.net/v14826](https://pinovel.net/v14826).*

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