---
title: "Imouto ni Boukyaku no Shitone o ~Kenbou Ryoujoku~"
description: "Assault on a younger sister suffering from the amnesia and her counselor!  Her immature undeveloped body gets thoroughly developed into the full woman.  A submi"
image: "https://t.vndb.org/cv/53/10353.jpg"
---

# Imouto ni Boukyaku no Shitone o ~Kenbou Ryoujoku~

![Imouto ni Boukyaku no Shitone o ~Kenbou Ryoujoku~](https://t.vndb.org/cv/53/10353.jpg)

**Alternative Title:** 少女玩具に忘却の褥を～健忘陵辱～

**Aliases:** Bed of oblivion to the toy girl, Tosyo

**Developer:** Parthenon

**Release date:** Aug 16, 2008

**Platform:** Windows, DVD

**Language:** Japanese

**Rating:** 6.2/10 (12 votes)

## Description
Assault on a younger sister suffering from the amnesia and her counselor!

Her immature undeveloped body gets thoroughly developed into the full woman.

A submissive sister heroine Hikari and her counselor, Aoi, who keeps an eye on Hikari

However, Aoi cannot go against the main character, for a very good reason.

Aoi must face the main character who assaults Hikari. She is troubled because of this dilemma. As a compromising solution, she decides to surrender her body to the main character.

[from [DLsite English](http://www.dlsite.com/ecchi-eng/work/=/product_id/RE044687)]

## Characters
### Amamiya Masato (天宮 政人)
- **Gender:** Male
- **Hair:** Black, Short, Spiky Bangs
- **Body:** Slim, Olive
- **Clothes:** Trousers, Shirt
- **Personality:** Boku, Pervert, Assertive, Dishonest, Promiscuous
- **Role:** Full Brother, Criminal, Not a Virgin, Older Brother, Prisoner
- **Engages in:** Gaslighting

### Amamiya Hikari (天宮 ひかり)
- **Gender:** Female
- **Hair:** Black, Hime Cut, Long, Straight, Blunt Bangs
- **Body:** Teen, Slim, Pale, Medium Breasts
- **Clothes:** School Uniform, Glasses, Headband, Knee-high Socks, Mary Jane
- **Subject of:** Amnesia, Psychological Trauma, Weak Memory, Mental Age Regression, Gaslighting
- **Eyes:** Blue
- **Role:** Daughter, Full Sister, High School Student, Not a Virgin, Younger Sister
- **Personality:** Naive, Docile, Bookworm, Watashi
- **Voiced by:** Kozuki Kureha

### Sugimura Aoi (杉村 葵)
- **Gender:** Female
- **Hair:** Brown, Parted to Side, Sidehair, Spiky Bun
- **Body:** Slim, Pale, Young-adult, Big Breasts
- **Eyes:** Green
- **Clothes:** Apron, Glasses, Shirt, Miniskirt, Pantyhose, Mary Jane
- **Role:** Psychologist
- **Personality:** Protective
- **Voiced by:** Himuro Yuri

## Shops
- [Official Website](https://web.archive.org/web/20080828041927/http://www.soft-parthenon.com/pimg/tosyo/index.html)
- [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ044687.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=691478)

## Releases
### Japanese
- **2008-08-04**: Imouto ni Boukyaku no Shitone o ~Kenbou Ryoujoku~ Trial Edition - [Official website](http://www.soft-parthenon.com/product/tosyo/index.html)
- **2008-08-16**: Imouto ni Boukyaku no Shitone o ~Kenbou Ryoujoku~ Package Edition - [Official website](https://web.archive.org/web/20080828041927/http://www.soft-parthenon.com/pimg/tosyo/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=11307), [Getchu](http://www.getchu.com/soft.phtml?id=691478)
- **2009-01-18**: Imouto ni Boukyaku no Shitone o ~Kenbou Ryoujoku~ Download Edition - [Official website](https://web.archive.org/web/20080828041927/http://www.soft-parthenon.com/pimg/tosyo/index.html), [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ044687.html), [Gyutto](https://gyutto.com/i/item15140), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0027699/), [DL.Getchu](http://dl.getchu.com/i/item10037), [DMM](https://dlsoft.dmm.co.jp/detail/crg_0053/)
- **2010-01-10**: Koware Yuku Imouto no Kioku ~Muku na Shoujo wo Hakudaku Mamire Ni~ DVDPG - [Official website](https://web.archive.org/web/20110317083043/http://www.ktfactory.tv/detail?t=1&i=554b59f4628f51d97b4bf8adcf0e7bf5), [DMM](https://www.dmm.co.jp/mono/anime/-/detail/=/cid=50ktpg100/)

## Tags
ADV, Male Protagonist, Heroine with Glasses, Big Breast Sizes Heroine, Boobjob, Sixty-nine, Librarian Heroine, Blowjob, Masturbation, Doggy Style, Cowgirl, Sitting Sex, High School Student Heroine, Heroine with Big Breasts, Protagonist's Younger Sister as a Heroine, Protagonist's Full Sister as a Heroine, Rape Victim Heroine, Blood-related Brother/Sister Incest, Only Non-Virgin Heroines, Amnesiac Heroine, Heroine with Psychological Problems, Bookworm Heroine, Rape, Adult Heroine, Psychological Trauma, Rapist Protagonist, Sex in Public Places, Perverted Protagonist

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---
*View the full details at [pinovel.net/v8120](https://pinovel.net/v8120).*

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