---
title: "Netorare Boukan Nikki ~Hentai Ishi no Seikenkyuu no Ejiki to Nari Risei no Kamen o Hagarete Yogari Nakasareru Ore no Imouto to Osananajimi to Sensei~"
description: "The protagonist was a regular student (male). His strict role model female teacher, tender and shy female friend and super cute imouto were all part of a fun ac"
image: "https://t.vndb.org/cv/00/8800.jpg"
---

# Netorare Boukan Nikki ~Hentai Ishi no Seikenkyuu no Ejiki to Nari Risei no Kamen o Hagarete Yogari Nakasareru Ore no Imouto to Osananajimi to Sensei~

![Netorare Boukan Nikki ~Hentai Ishi no Seikenkyuu no Ejiki to Nari Risei no Kamen o Hagarete Yogari Nakasareru Ore no Imouto to Osananajimi to Sensei~](https://t.vndb.org/cv/00/8800.jpg)

**Alternative Title:** 寝取られ・傍観・日記～変態医師の性研究の餌食となり理性の仮面を剥がれてヨガり泣かされる俺の妹と幼馴染と先生～

**Aliases:** Netorare Idle Watching Diary -The pervy flu stole my sister, friend and teacher-

**Developer:** Dieselmine

**Release date:** Dec 10, 2010

**Platform:** Windows, DVD

**Language:** Japanese

**Rating:** 5.6/10 (18 votes)

## Description
The protagonist was a regular student (male). His strict role model female teacher, tender and shy female friend and super cute imouto were all part of a fun academic life.

But one day something strange happened to his teacher. It seemed to be an airborne infection. Then it spread to his friend and sister. They all became.. strange. It wasn't clear, but the girls were... different.

To learn what's come over them, he followed them...

[From [DLsite English](http://www.dlsite.com/ecchi-eng/work/=/product_id/RE070857.html)]

## Characters
### Mihashi Taiki (深橋 大樹)
- **Gender:** Male
- **Role:** Student, Older Brother
- **Subject of:** Netori (their SO is stolen)

### Komori Haruka (小守 春香)
- **Gender:** Female
- **Hair:** Brown, Waist Length+, Curtained, Parted in Middle, Pubic Hair
- **Body:** Pale, Young-adult, Big Breasts
- **Eyes:** Violet
- **Clothes:** Glasses, Necktie, Pantyhose, Belt, Bondage Harness, Ribbon Hair Tie, Skirt Suit
- **Role:** Teacher
- **Subject of:** Netorare (they are the stolen SO)
- **Voiced by:** Haichi Yuu

### Mihashi Kotomi (深橋 琴美)
- **Gender:** Female
- **Hair:** Pink, Twin Tails, Shoulder-length, Pubic Hair
- **Body:** Teen, Pale, Medium Breasts
- **Clothes:** School Uniform, Knee-high Socks, Collar, Hairpin, Ribbon Hair Tie, Pleated Skirt, Blazer
- **Role:** Student, Younger Sister
- **Eyes:** Amber, Tareme
- **Subject of:** Netorare (they are the stolen SO)
- **Voiced by:** Nekokoma Yuzuru

### Sakai Nana (左海 奈々)
- **Gender:** Female
- **Hair:** Blue, Shoulder-length, Spiky Bangs, Pubic Hair
- **Body:** Teen, Pale, Big Breasts
- **Clothes:** School Uniform, T-shirt, Sport Bloomers, Collar, Bondage Harness, Tracksuit, Blazer
- **Role:** Student, Childhood Friend
- **Eyes:** Green
- **Subject of:** Netorare (they are the stolen SO)
- **Voiced by:** Ayana Maria

## Shops
- [Official Website](http://www.dieselmine.com/2010/ntrdiary/index.html)
- [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ070857.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=996381)

## Releases
### Japanese
- **2010-12-10**: Netorare Boukan Nikki ~Hentai Ishi no Seikenkyuu no Ejiki to Nari Risei no Kamen o Hagarete Yogari Nakasareru Ore no Imouto to Osananajimi to Sensei~ Download Edition - [Official website](http://www.dieselmine.com/2010/ntrdiary/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=14755), [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ070857.html), [Gyutto](https://gyutto.com/i/item49052), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0047642/), [DL.Getchu](http://dl.getchu.com/i/item34249), [DMM](https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_032689/)
- **2010-12-30**: Netorare Boukan Nikki ~Hentai Ishi no Seikenkyuu no Ejiki to Nari Risei no Kamen o Hagarete Yogari Nakasareru Ore no Imouto to Osananajimi to Sensei~ Package Edition - [Official website](http://www.dieselmine.com/2010/ntrdiary/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=14755), [Getchu](http://www.getchu.com/soft.phtml?id=698844)
- **2018-04-27**: Netorare Boukan Nikki ~Hentai Ishi no Seikenkyuu no Ejiki to Nari Risei no Kamen o Hagarete Yogari Nakasareru Ore no Imouto to Osananajimi to Sensei~ DVDPG - [Official website](http://www.dieselmine.com/2010/ntrdiary/index.html), [Getchu](http://www.getchu.com/soft.phtml?id=996381), [DMM](https://www.dmm.co.jp/mono/anime/-/detail/=/cid=cppg225/), [Toranoana](https://ec.toranoana.shop/tora/ec/item/210006589114/)

## Tags
ADV, Lesbian Sex, Male Protagonist, Multiple Endings, Teacher Heroine, Heroine with Glasses, Protagonist's Childhood Friend as a Heroine, Nukige, Bondage, Illness, Group Sex of One Male and Several Females, Group Sex of One Female and Several Males, Student Heroine, Netorare, Student Protagonist, Other Perspectives, Sexual Devices, Vibrators, Dildos, Remote-controlled Vibrator, Intercrural Sex, Multiple Penetration, Non-penetrative Sex, Tribadism, Cunnilingus, Consensual Group Sex of One Female and Several Males, Group Sex of Several Females, Voyeurism, Enema, Female Ejaculation, Feet Licking, Anal Toys, Cowgirl, Wooden Horse, Ahegao, Close-up CGs, Erotic Electrostimulation, Humping, Sexual Blindfold, Gang Bang, Suction on Nipples, Suspension Bondage, Double Dildos, Heroine with Pubic Hair, Heroine Having Sex with Others, Rope Bondage, Leather Bondage, Vaginal + Anal Object Insertion, Vaginal Masturbation, Anal Sex, Vaginal Fingering, Heroine with Big Breasts

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---
*View the full details at [pinovel.net/v7004](https://pinovel.net/v7004).*

```json
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```