---
title: "Oni Chichi ~Manamusume Kyousei Hatsujou~"
description: "The protagonist's remarriage leaves him with two daughters. The girls hesitantly decide to live in harmony with their new father, but their mother has chosen th"
image: "https://t.vndb.org/cv/86/28686.jpg"
---

# Oni Chichi ~Manamusume Kyousei Hatsujou~

![Oni Chichi ~Manamusume Kyousei Hatsujou~](https://t.vndb.org/cv/86/28686.jpg)

**Alternative Title:** 鬼父～愛娘強制発情～

**Aliases:** Evil Father

**Developer:** Blue Gale

**Release date:** Oct 24, 2008

**Platform:** Windows, DVD

**Language:** Japanese

**Rating:** 6.9/10 (122 votes)

## Description
The protagonist's remarriage leaves him with two daughters.
The girls hesitantly decide to live in harmony with their new father, but their mother has chosen the wrong partner.
Although he's usually a serious and gentle father, deep down inside, he harbors a powerful desire to rape his beloved daughters.
He wants to pour every last drop of his boiling hot semen into the most precious parts of their supple bodies!!
His dark desire grows stronger with each passing day.
Using the "love drug" he developed to make his beloved daughters slaves to pleasure before they become another man's possession!

[Modified from [DLSite, archived](https://web.archive.org/web/20250209212717/https://www.dlsite.com/pro/work/=/product_id/VJ004197.html)]

## Characters
### Akitsuki Kouzou (秋月 孝三)
The protagonist. A researcher who managed to create an aphrodisiac while experimenting on hormone secretion. He often gets called to teach at the school his step daughters attend.

After an accident where he was exposed to certain chemicals he became sexually impotent for a while, but regains it after seeing [url=/c23775]Airi[/url] and [url=/c23774]Marina[/url]. Soon after this he realized that he only gets aroused by younger girls, and he decides to marry Airi and Marina's mother in order to get closer to them.

- **Gender:** Male
- **Hair:** Black, Shaggy
- **Eyes:** Hidden
- **Body:** Adult
- **Clothes:** Suit
- **Role:** Husband, Teacher, Non-blood-related Father, Not a Virgin, Researcher
- **Items:** Mobile Phone
- **Personality:** Smart
- **Engages in:** Infidelity, Drugging

### Akitsuki Airi (秋月 愛莉)
A first-year student at Seifu Academy. The younger sister. A virgin.
Her grades are average, and she’s active in the light music club.
She’s half-French, with strong French heritage, and her breasts are on the larger side.
She’s free-spirited and willful, and she’s terrible at household chores.
She respects her older sister, but when they’re face to face, she’s nothing but sarcastic.
She finds the protagonist suspicious.

[Translated and edited from [url=https://gyutto.com/i/item13052?select_uaflag=1]Gyutto[/url]]

- **Gender:** Female
- **Hair:** Blond, Twin Tails, Waist Length+, Spiky Bangs, Thick Eyebrows
- **Body:** Teen, Slim, Pale, Big Breasts
- **Clothes:** School Uniform, Kemonomimi Headband, Jacket, Necktie, T-shirt, Miniskirt, Thigh-high Stockings, Cuffs, Strap-on Dildo, Ribbon Hair Tie, Crop Top, Pleated Skirt, Loafers, Uwabaki, Short Shorts, Patterned Thigh-high Stockings
- **Eyes:** Blue
- **Personality:** Tsundere, Selfish
- **Role:** Full Sister, Classmate, Kouhai, Non-blood-related Daughter, Half-Japanese, French, Younger Sister, Tenth Grader
- **Subject of:** Pregnancy, Filming, Being Drugged
- **Voiced by:** Oukawa Mio

### Akitsuki Marina (秋月 真理奈)
A third-year student at Seifu Academy. The older sister. A virgin.
She’s a studious, reserved, and serious girl.
She’s half-French with strong Japanese heritage, but she has quite large breasts.
She helps her mother with household chores.
She’s been dating her boyfriend for a year, but it seems they haven’t had sex yet.
However, they’ve apparently promised to have sex after her midterms, and because of her serious nature, she’s feeling conflicted.
She wants to support her mother and father.


[Translated and edited from [url=https://gyutto.com/i/item13052?select_uaflag=1]Gyutto[/url]]

- **Gender:** Female
- **Hair:** Brown, Waist Length+, Straight, Parted to Side, Sidehair
- **Body:** Teen, Slim, Pale, Big Breasts
- **Clothes:** School Uniform, Pajamas, Knee-high Socks, Thigh-high Stockings, Maid's Dress, Blouse, Garter, Maid's Headdress, Choker, Loafers, Lace Lingerie, Uwabaki
- **Engages in:** Cooking
- **Eyes:** Violet
- **Role:** Full Sister, Classmate, Senpai, Non-blood-related Daughter, Half-Japanese, French, Older Sister, Twelfth Grader
- **Subject of:** Pregnancy, Being Drugged
- **Personality:** Kind
- **Voiced by:** Kawashima Rino

### Akitsuki Kayoko (秋月 華代子)
Airi and Marina's mother, recently remarried to Kouzou.

- **Gender:** Female
- **Engages in:** Cooking, Flirting
- **Role:** Wife, Mother, Teacher
- **Personality:** Kind, Naive, Loyal
- **Subject of:** Infidelity, Being Drugged
- **Voiced by:** Misumi Nanaho

### Kuranaka Sana (倉中 紗奈)
A first-year student at Seifu Academy. Airi’s best friend. A virgin.
Her grades are average, but she’s terrible at sports.
She met Airi back in elementary school, when Airi was an outcast, and they’ve been friends ever since.
She seems to envy the fact that Airi’s new father is a university professor.
She’s a member of the video club and wants to shoot a music video starring Airi.
She has an average bust size.

[Translated and edited from [url=https://gyutto.com/i/item13052?select_uaflag=1]Gyutto[/url]]

- **Gender:** Female
- **Hair:** Brown, Short, Parted to Side
- **Body:** Teen, Slim, Pale
- **Clothes:** School Uniform, Hairpin
- **Eyes:** Green
- **Personality:** Friendly, Mischievous
- **Role:** Friend, Classmate, School Cultural Club Member, Tenth Grader
- **Items:** Video Camera
- **Engages in:** Filming
- **Voiced by:** Nomiya Kaori

### Mikami Yuka (三上 由佳)
A third-year student at Seifu Academy. She’s in the same class as Marina. She is not a virgin.
In exchange for medical treatment for her parents, she serves as a test subject for the protagonist’s research; she shows no signs of reluctance and calmly accepts his requests.
Because she places absolute trust in the protagonist, she is inwardly unsettled by the arrival of Marina and Airi.
The protagonist took her virginity, and she has no experience with sexual intercourse with anyone other than him.
By the way, she has small breasts.

[Translated and edited from [url=https://gyutto.com/i/item13052?select_uaflag=1]Gyutto[/url]]

- **Gender:** Female
- **Hair:** Black, Hime Cut, Waist Length+
- **Body:** Teen, Slim, Pale
- **Clothes:** School Uniform, Pantyhose
- **Eyes:** Violet
- **Role:** Classmate, Senpai, Twelfth Grader, Pre-Story Virginity Loss to Protagonist
- **Personality:** Loyal
- **Subject of:** Being Drugged
- **Voiced by:** Konoha

### Oono Masato (大野 雅人)
Marina's boyfriend. When Kouzou finds out Marina plans to give him her virginity, Kouzou uses the aphrodisiac to claim her for himself, and to further split them up, arranges for Marina to catch Masato being unfaithful, in the act.

- **Gender:** Male
- **Role:** Student, Boyfriend
- **Personality:** Idiot, Pervert, Violent, Childishly Violent
- **Engages in:** Infidelity, Sexual Harassment
- **Subject of:** Sexual Harassment, Netori (their SO is stolen), Being Drugged

### Southern (南部)
Kouzou's fellow researcher who helps him develop the aphrodisiac spray with Yuka being a willing test subject.

- **Gender:** Male
- **Role:** Scientist
- **Personality:** Kind, Naive, Smart, Loyal
- **Engages in:** Not Sexually Involved

## Shops
- [Official Website](http://59.158.47.118/soft/bg_121/)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ004197.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=1205537)

## Releases
### Japanese
- **2008-10-24**: Oni Chichi ~Manamusume Kyousei Hatsujou~ Package Edition - [Official website](http://59.158.47.118/soft/bg_121/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=11361)
- **2009-12-02**: Oni Chichi ~Manamusume Kyousei Hatsujou~ Download Edition - [Official website](http://59.158.47.118/soft/bg_121/), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ004197.html), [Gyutto](https://gyutto.com/i/item13052), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0038601/), [DL.Getchu](http://dl.getchu.com/i/item1002118), [DMM](https://dlsoft.dmm.co.jp/detail/bluegale_0023/)
- **2010-01-21**: Oni Chichi ~Manamusume Kyousei Hatsujou~ DVDPG - [Official website](https://web.archive.org/web/20100329130216/http://www.aicherry.com/aicherryhp/contents/petitcherry/jacket/aicdv0218/aicdv0218.html), [DMM](https://www.dmm.co.jp/mono/anime/-/detail/=/cid=1481aicdv0218/)
- **2014-05-23**: Oni Chichi ~Manamusume Kyousei Hatsujou~ DVD Renewal Edition - [Official website](http://59.158.47.118/soft/bg_121/)
- **2014-08-08**: Blue Gale Memorial Collection - [DMM](https://dlsoft.dmm.co.jp/detail/bluegale_0032/)
- **2018-12-21**: Blue Gale Complete Pack - [DMM](https://dlsoft.dmm.co.jp/detail/bluegale_0038pack/)
- **2023-02-24**: Nukicolle vol.31 - Oni Chichi 1 + 2 - [Getchu](http://www.getchu.com/soft.phtml?id=1205537)

## Tags
ADV, High School, Lesbian Sex, Rape, Non-blood-related Incest, Unavoidable Rape, Male Protagonist, Adult Protagonist, Multiple Endings, Father Support Character, Nukige, Modern Day Japan, Group Sex of One Male and Several Females, Student Heroine, Pregnant Sex, Rapist Protagonist, Slice of Life, Teacher Protagonist, Netori, Sex Involving Drugs, Big Breast Sizes Heroine, Tsundere Heroine, Unlockable Harem Ending, Perverted Protagonist, Sexual Devices, Strap-on Dildos, Defloration, Sex in Public Places, Anal Penetration, Footjob, Boobjob, Scientist Protagonist, Twin Tail Heroine, Missionary Position, Sixty-nine, Sounds of Copulation, Internal Exhibition of Sex, Blowjob, Handjob, Twin Blowjob, Impregnation, Date Display, Anilingus, Masturbation, Protagonist's Non-blood-related Daughter as a Heroine, Half-Japanese Heroine, Cunnilingus, Doggy Style, Non-blood-related Father/Daughter Incest, Infidelity, Outdoor Sex, Stalking, Naked Sprites, Petplay, Fingering, Cowgirl, Reverse Cowgirl, Shimaidon Ending, Pregnancy Ending, Standing Sex, Sitting Sex, Spoons, Ahegao, Production of Pornography (Amateur), Bathroom Sex, Love Hotel, Twin Footjob, Specula (Sexual), Onahole, Colposcopy Camera (Sexual), Gynecologist Chair, Sex on Toilet, Legwear Footjob, Vaginal Masturbation, Anal Sex, Vaginal Gaping, High School Student Heroine, Food Gokkun, Heroine with Pre-story Virginity Loss to the Protagonist, Heroine Having Sex with Others, Fathercon Heroine

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- [Oni Chichi 2](https://pinovel.net/v2214)
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- [Natsu Doki!](https://pinovel.net/v14010)
- [Oni Chichi After ~Nure Suke Airi to Amayadori Hen~](https://pinovel.net/v18459)
- [Oni Chichi After 2 ~Marina to Shingata Hatsujou Spray Test Hen~](https://pinovel.net/v18922)
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---
*View the full details at [pinovel.net/v3343](https://pinovel.net/v3343).*

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