---
title: "Gibo"
description: "My name is Yusuke Yagami. When I was a boy, I witnessed something which no one should ever see. My own mother, locked in the throes of passion with a man who wa"
image: "https://t.vndb.org/cv/47/130447.jpg"
---

# Gibo

![Gibo](https://t.vndb.org/cv/47/130447.jpg)

**Alternative Title:** 義母

**Developer:** Guilty

**Release date:** Feb 9, 2001

**Platform:** Windows, DVD

**Language:** English, Japanese, Russian

**Rating:** 5.5/10 (524 votes)

## Description
My name is Yusuke Yagami. When I was a boy, I witnessed something which no one should ever see. My own mother, locked in the throes of passion with a man who wasn't my father. Her adultery caused our happy home to come crashing down, and my father divorced her. Since those dark days, I've been mistrustful of what the concept of 'mother' really was.

Now, after so many years, my father remarried, and suddenly, I had a new stepmother, or Gibo.

The woman my father married was not old, but young, and beautiful. When I looked at Misako-san for the first time, I felt something move inside me. As the days went by, I found myself thinking of my new mother in ways that shocked myself. Could I accept this beautiful woman as my mother? After all, I found out what mothers are really like the day I saw their unfaithfulness. Punishment may be necessary...

[From [JAST USA](https://jastusa.com/games/p008/)]

## Characters
### Yagami Yuusuke (八神 祐介)
Yuusuke's a college student that lived alone ever since his father and mother divorced but his life will change once his father remarries a beautiful widowed woman and he suddenly gets a [url=https://vndb.org/c59422]step-mother[/url]. Accompanying his step-mother is also her daughter, Yuusuke's new [url=https://vndb.org/c59423]step-sister[/url]. With the introduction of new family members, Yagami residence perhaps will not be as lonely as before. But with new residents in the house, something else burried deep in Yuusuke's subconsciousness will also awake. The past traumas of his biological mother's adultery will resurface once again and will come back to haunt Yuusuke. Will his new 'mother' be able to soothe his anxiety or will she just simply become a victim of his displaced anger?

[Edited from [url=https://www.gamefaqs.com/pc/921736-gibo-stepmothers-sin/faqs/31321]Geo's Walkthrough[/url]]

- **Gender:** Male
- **Hair:** Brown, Curtained, Short, Straight, Orange
- **Body:** Teen, Pale
- **Clothes:** Trousers, T-shirt
- **Eyes:** Amber
- **Personality:** Ore, Arrogant, Distrustful, Assertive, Cruel
- **Engages in:** Molesting, Blackmail, Sexual Harassment, Wedding
- **Role:** Step Brother, Cousin, High School Student, Non-blood-related Son, Not a Virgin, Older Brother, Sexual Dominant, Sex Friend
- **Subject of:** Psychological Trauma

### Shinohara Mio (篠原 未央)
[url=https://vndb.org/c60747]Yuusuke[/url]'s cousin Mio is a high school student that goes to the same school as him. She is a honor student who enjoys being a class representative. She's got a calm, relaxed type of personality. She likes putting up a facade of being a "good girl" while in secret she has a hidden side of hers that loves sex. Although Mio considers Yuusuke a mere plaything, she'll feel disturbed by the prospect of losing him from her grasp once [url=https://vndb.org/c59422]Misako[/url] moves in to Yuusuke's residence.

[Edited from [url=https://www.gamefaqs.com/pc/921736-gibo-stepmothers-sin/faqs/31321]Geo's Walkthrough[/url]]

- **Gender:** Female
- **Measurements:** C cup
- **Hair:** Brown, Ponytail, Long, Straight, Intake, Spiky Bangs, Parted in Middle, Pubic Hair
- **Body:** Teen, Slim, Pale
- **Clothes:** School Uniform, Earrings, Jacket, Beret, Strap-on Dildo, Turtleneck Shirt, Ribbon Tie, Ribbon Hair Tie, Fishnet Thigh-high Stockings, Latex Long Gloves
- **Eyes:** Green, Tareme
- **Personality:** Pretending, Relaxed, Smart, Promiscuous
- **Role:** Cousin, Class President, High School Student, Honor Student, Sex Friend, Pre-Story Virginity Loss to Protagonist
- **Voiced by:** Hokuto Minami

### Yagami Misako (八神 美沙子)
Misako is [url=https://vndb.org/c60747]Yuusuke[/url]'s father's new wife. Her previous husband died three years prior to the beginning of the game's story. The relationship between Misako and her new husband is nothing more than a marriage of convenience for Yuusuke's father's company and there is no real affection between them. A yearning for something that she couldn't express has freed Misako's forbidden desires, as her relationship with her new step-son started to grow more and more complex.

[Edited from [url=https://www.gamefaqs.com/pc/921736-gibo-stepmothers-sin/faqs/31321]Geo's Walkthrough[/url]]

- **Gender:** Female
- **Aliases:** 菊地 美沙子, Kikuchi Misako
- **Hair:** Violet, Bun, Odango, Ponytail, Long, Wavy, Curtained, Braid, Ringlet, Sidehair, Pubic Hair
- **Body:** Slim, Pale, Young-adult, Mole, Makeup, Nipple Piercing, Big Breasts
- **Engages in:** Cooking, Cosplay, Infidelity, Lactation, Wedding, Moving
- **Eyes:** Blue, Tareme
- **Clothes:** Apron, Earrings, Glasses, Miniskirt, Chinese Dress, Wedding Dress, Bikini, Nurse Uniform, Garter Belt Stockings, Bondage Harness, Towel, Turtleneck Shirt, Veil, Ribbon Hair Tie, Skirt Suit, Baby-doll, Torn Clothing, Nurse's Cap, Sailor School Uniform, Loafers, Cupless Corset, Loose Socks
- **Personality:** Reserved, Kind, Naive, Docile, Watashi
- **Subject of:** Molesting, Blackmail, Sexual Harassment, Sexual Corruption
- **Role:** Widow, Mother, Yamato Nadeshiko, Not a Virgin, Non-blood-related Mother, Housewife, Sexual Submissive
- **Voiced by:** Shirai Ayano

### Yagami Shiina (八神 しいな)
Shiina is the daughter of [url=https://vndb.org/c59422]Misako[/url] and her previous husband. She have moved in to [url=https://vndb.org/c60747]Yuusuke[/url]'s home together with Misako after her mother's new marriage. She is a kind step-sister and a pure girl who has never known mistrust. Because she has nobody to look up to as a fatherly figure in her life, she constantly seeks an older male who can act that role for her. Somewhat inevitably, she'll develop a girlish kind of crush on her new step-brother. Depending on Yuusuke's choices, their relationship could grow into something more than just that of a simple brother and sister.

[Edited from [url=https://www.gamefaqs.com/pc/921736-gibo-stepmothers-sin/faqs/31321]Geo's Walkthrough[/url]]

- **Gender:** Female
- **Aliases:** 菊地 しいな, Kikuchi Shiina
- **Hair:** Blue, Short, Spiky Bangs, Thick Eyebrows, Pubic Hair
- **Body:** Teen, Slim, Pale, Fang, Makeup
- **Clothes:** School Uniform, Pajamas, Headband, Thigh-high Stockings, Wedding Dress, Leotard, Bondage Harness, Veil, Pleated Skirt, String Ribbon Tie, Rope Bondage Harness
- **Role:** Student, Daughter, Step Sister, Younger Sister, Sexual Submissive
- **Eyes:** Blue, Tareme
- **Personality:** Shy, Kind, Naive, Docile
- **Engages in:** Rhythmic Gymnastics, Wedding, Moving
- **Subject of:** Sexual Corruption
- **Voiced by:** AKIRA (seiyuu)

### Yusuke Yagami's Mother
Yusuke's biological mother and the maternal aunt of Mio, a very beautiful and attractive woman with voluptous large breasts. Being a nymphomaniac, she had sex with her lover everyday, cheating on her husband Eizo while her son Yusuke was at school, once she traumatized her son Yusuke who witnessed her adultery by accident. Eventually Eizo found out about her adultery and thus they divorced.

- **Gender:** Female
- **Hair:** Brown, Long, Wavy
- **Role:** Mother, Full Sister, Aunt
- **Engages in:** Infidelity
- **Body:** Big Breasts

## Shops
- [Official Website](https://rapidgator.net/file/e702fb06e55dd35bc7490f869571fe60/Gibo.rar.html)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ001644.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=17423)

## Releases
### Japanese
- **2001-02-09**: Gibo - First Press Limited Edition - [Official website](http://web.archive.org/web/20040831021411/http://www.guilty-soft.com/gBest/best01.htm), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=1167), [Getchu](http://www.getchu.com/soft.phtml?id=1382)
- **2001-02-09**: Gibo - Regular Edition - [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=1167), [Getchu](http://www.getchu.com/soft.phtml?id=5021)
- **2002-09-26**: Gibo - Full Animation DVDPG - [Getchu](http://www.getchu.com/soft.phtml?id=17423)
- **2007-12-17**: Gibo - Download Edition - [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ001644.html), [Gyutto](https://gyutto.com/i/item1971), [DMM](https://dlsoft.dmm.co.jp/detail/will_0015/)
- **2023-01-30**: Gibo - [Official website](https://rapidgator.net/file/e702fb06e55dd35bc7490f869571fe60/Gibo.rar.html)

### English
- **2004-05-28**: Gibo: Stepmother's Sin - Package Edition - [Official website](https://web.archive.org/web/20040613081013/http://www.peachprincess.com:80/Merchant2/merchant.mv?Screen=PROD&Store_Code=PP&Product_Code=P008&Category_Code=BG)
- **2008-07**: Gibo: Stepmother's Sin - Download Edition - [JAST USA](https://jastusa.com/games/p008/gibo-stepmother), [J-List](https://jlist.com/shop/product/gibo-stepmothers-sin-download-edition)
- **2014-11-24**: Hitomi My Stepsister + Gibo: Stepmother's Sin Bundle Pack - [J-List](https://jlist.com/shop/product/Hitomi-My-Stepsister--Gibo-Stepmothers-Sin-Bundle-Pack), [PlayAsia](https://www.play-asia.com/13/701xxy)

### Russian
- **2005**: Gibo
- **2008-06-11**: Gibo: Stepmother's Sin - [Official website](https://www.zoneofgames.ru/games/gibo_stepmothers_sin/files/2850.html)

## Tags
Sexual Content, ADV, Incest, Brother/Sister Incest, Non-blood-related Incest, Non-blood-related Brother/Sister Incest, Imouto-type Heroine, Male Protagonist, Multiple Endings, Yandere Heroine, Nukige, Sexual Slavery, Bondage, Fictional Modern Day Japanese Town, Protagonist's Non-blood-related Sister as a Heroine, Timid Heroine, Domicile, Villainous Protagonist, Group Sex of One Male and Several Females, Group Sex of One Female and Several Males, Student Heroine, Early Sexual Content, Rapist Protagonist, Chikan Protagonist, Cousin Incest, Protagonist's Cousin as a Heroine, Under the Same Roof, Harem Ending, Obsession, Heroine with Sexual Experience, Adult Heroine, Protagonist with Psychological Problems, Netorare, Netori, Married Heroine, Sexual Harassment, Chikan, Big Breast Sizes Heroine, Unavoidable Heroine Rape, Perverted Protagonist, Protagonist's Non-blood-related Mother as a Heroine, Non-blood-related Mother/Son Incest, Rape with Blackmail, Protagonist with Sexual Experience, Bad Ending(s), Ponytail Heroine, Completely Avoidable Netorare, Urination Fetish, Sexual Devices, Vibrators, Dildos, Strap-on Dildos, Protagonist with a Face, Defloration, Sex in Public Places, Anal Penetration, Boobjob, Cosplay, Sixty-nine, Scat, Promiscuous Heroine, Sounds of Copulation, Blowjob, Handjob, Blood-related Mother/Daughter Incest, Lactation During Sex, Triple Blowjob, Lots of Choices, Heroine with Intake Hairstyle, Intercrural Sex, Multiple Penetration, Bukkake, Masturbation, BDSM, Heroine with Chinese Dress, High School Student Protagonist, Cunnilingus, Object Insertion, More Than Seven Endings, Brocon Heroine, Enema, Doggy Style, Infidelity, Outdoor Sex, Heroine with Beauty Mark, Naked Sprites, Athlete Heroine, Fingering, Threesome Ending, Cowgirl, Wax Play, Bleep Censor, Oyakodon Ending, Mother/Son Incest, Standing Sex, Sitting Sex, Butterfly, Production of Pornography (Amateur), Food Play, Bathroom Sex, Sexual Slavery (Choukyou Variation), Sex in Front of an Audience, Mutual Masturbation, Ending Scene Recollection, Soapy Massage, Heroine with Children, Marriage Ending, Heroine with Garter Belt, Quickie Fix Position, Piss Drinking, Specula (Sexual), Sex at School, Heroine with Pubic Hair, No Skip Read Text Option, Gauge Display, Threesome, Armbinder, Heroine Having Sex with Others, High School Student Heroine, Heroine with Big Breasts, Heroine with Pre-story Virginity Loss to the Protagonist

## More Games from Guilty
- [Reijou Sera](https://pinovel.net/v13654)
- [Hi-To-Mi](https://pinovel.net/v13655)
- [Onii-chan e](https://pinovel.net/v13656)
- [Kokuhaku](https://pinovel.net/v5879)
- [Bishoujo Dorei Club](https://pinovel.net/v2944)
- [Ingoku no Gakuen Biseito Choukyou](https://pinovel.net/v3741)
- [Reijou Caster Mariko](https://pinovel.net/v7050)
- [Shiyouzumi ~Condom~](https://pinovel.net/v7243)
- [Dennou M Dorei - Reimi](https://pinovel.net/v2253)
- [Shiyouchuu ~W.C.~](https://pinovel.net/v1484)
- [Ryoujokuki](https://pinovel.net/v17755)
- [~Miboujin~ Niku Dorei](https://pinovel.net/v6186)
- [Gibo](https://pinovel.net/v135)
- [Bishimai Kutsujoku no Heya](https://pinovel.net/v3708)
- [Bougyaku Gakuen](https://pinovel.net/v7877)
- [Shinnin Eigo Kyoushi Yumiko to Tennis Club Nureta Underskirt no Chouhatsu](https://pinovel.net/v7215)
- [Onna Kyoushi -Nikutai Jugyou-](https://pinovel.net/v5793)
- [Boku no Atarashii Sensei](https://pinovel.net/v3710)
- [Reijou Caster 2](https://pinovel.net/v7049)
- [Kateinai Choukyou](https://pinovel.net/v4330)
- [Enkaku Sousa ~Mitsuniku ni Umekomareta Remocon Vibe~](https://pinovel.net/v2304)
- [Seido Maria ~Hakudaku Mamire no Zangeshitsu~](https://pinovel.net/v7173)
- [Hitozuma Onna Kyoushi Reika ~Nyuujoku no Mesu Dorei~](https://pinovel.net/v3719)
- [Kugutsume -Saiin Byoutou 24 Ji-](https://pinovel.net/v4278)
- [Wana ~Hakudaku Mamire no Houkago~](https://pinovel.net/v6680)
- [Gibo to Oba ~Soshite Yuujin no Haha~](https://pinovel.net/v2498)
- [Toriko Hime ~Hakudaku Mamire no Reijou~](https://pinovel.net/v6905)
- [Kindan ~Kimi wa Boku Dake no Maiden~](https://pinovel.net/v3744)
- [Otome Juurin Yuugi ~Maiden Infringement Play~](https://pinovel.net/v4352)
- [Yakata Jukujo ~The Immoral Residence~](https://pinovel.net/v6109)
- [Helter Skelter ~Hakudaku no Mura~](https://pinovel.net/v2784)
- [Otome Chibaku Yuugi ~Disgrace Return Play~](https://pinovel.net/v4154)
- [Wana II ~Gang Rape~](https://pinovel.net/v4371)
- [Hitozuma Gui ~Manbiki G-man Chijoku Nikki~](https://pinovel.net/v2897)
- [Last Waltz ~Hakudaku Mamire no Natsu Gasshuku~](https://pinovel.net/v2864)
- [Tanetsuke Mura ~Hakudakugami, Nenbutsu Kou no Gi~](https://pinovel.net/v6353)
- [Yobai Suru Nananin no Harame](https://pinovel.net/v12443)
- [Ane o Tasukeru Tame Nokosareta Shimai o Kegasu Haitoku no Hibi](https://pinovel.net/v14549)
- [Yobai Suru Nananin no Harame 2](https://pinovel.net/v14710)
- [Tegome ni Sareru Kyuunin no Otome](https://pinovel.net/v15946)
- [Toriko no Shirabe ~Midara ni Aegu Otome Sextet~](https://pinovel.net/v17062)
- [Midara ni Aegu Nananin no Yobai Suru Harame](https://pinovel.net/v18368)
- [Toriko no Kusari ~Otome-tachi o Kegasu Midara na Kusabi~](https://pinovel.net/v19102)
- [Houkago ni Midareru Ane Kyoushi to Tonari no Heya de Aegu Imouto ~Koibito ni Natta Onna no Ko ga, Shiriai no Iya na Otoko ni Netorareru~](https://pinovel.net/v19656)
- [Tsukiakari ni Modaeru Harame](https://pinovel.net/v20105)
- [Toriko no Shizuku ~Natsu no Gouka Kyakusen de Kegasareru Otome-tachi~](https://pinovel.net/v20990)
- [Natsuyo ni Modaeru Nananin no Sasoime](https://pinovel.net/v21953)
- [Toriko no Yugami ~Ondai Sotsu no Moto Utahime ga Hibikaseru Midara na Nakigoe~](https://pinovel.net/v22600)
- [Ore no Ue de Agaku Rokunin no Togime](https://pinovel.net/v24084)
- [Toriko no Shirabe -refrain- Chouritsu Sareru Otome-tachi to Onna Kyoushi](https://pinovel.net/v25719)
- [Toriko no Shirabe -refrain- if](https://pinovel.net/v26890)
- [Harame ~Seishi o Hoshigaru Midara na Oshiego~](https://pinovel.net/v26622)
- [Toriko no Kizuna ~Ubawareta Gakuen ni Hibiku Shojo no Aegi~](https://pinovel.net/v28268)
- [Toriko no Shimai ~Midara ni Moteasobareru Unmei no Mayoigo~](https://pinovel.net/v31035)
- [Toriko no Tsubasa ~Butaiura de Midara ni Odoru Marionette~](https://pinovel.net/v34544)
- [Toriko no Chikai ~Nakama no Tame ni Karada o Kakeru Otome no Jingi~](https://pinovel.net/v44012)
- [Toriko no Urara ~Otoko no Sono ni Magirekonda Ichirin no Akai Hana~](https://pinovel.net/v50140)
- [Toriko no Shirabe -refrain- if Aina no Shou](https://pinovel.net/v52860)
- [Ore dake ni Kashizuku Haramaid-tachi ~Seishi o Musaboru Gonin no Yokushin Onna~](https://pinovel.net/v53713)
- [Toriko no Homura ~In'yoku no Honoo ni Michita Chika Tougijou~](https://pinovel.net/v56239)
- [Toriko no Sakura ~Utsukushiku Saki, Midara ni Chirasareru Otome-tachi~](https://pinovel.net/v63478)

---
*View the full details at [pinovel.net/v135](https://pinovel.net/v135).*

```json
{"@context":"https://schema.org","@type":"VideoGame","@id":"https://pinovel.net/v135#game","name":"Gibo","description":"My name is Yusuke Yagami. When I was a boy, I witnessed something which no one should ever see. My own mother, locked in the throes of passion with a man who wa","url":"https://pinovel.net/v135","image":"https://t.vndb.org/cv/47/130447.jpg","author":{"@type":"Organization","name":"Guilty"},"aggregateRating":{"@type":"AggregateRating","ratingValue":"5.5","bestRating":10,"worstRating":1,"ratingCount":524}}
```