---
title: "Otokano ~Otouto no Kanojo ga Bunkei de Tsuyome!?~"
description: "It’s a summer night. At home. After six months of dating, I finally cross the line with my humanities-major girlfriend. After going at it multiple times, we fal"
image: "https://t.vndb.org/cv/96/54396.jpg"
---

# Otokano ~Otouto no Kanojo ga Bunkei de Tsuyome!?~

![Otokano ~Otouto no Kanojo ga Bunkei de Tsuyome!?~](https://t.vndb.org/cv/96/54396.jpg)

**Alternative Title:** オトカノ ～おとうとの彼女が文系で強め!?～

**Developer:** North Box

**Release date:** May 27, 2022

**Platform:** Windows

**Language:** Japanese, English, Russian

**Rating:** 7.7/10 (103 votes)

## Description
It’s a summer night. At home.
After six months of dating, I finally cross the line with my humanities-major girlfriend.
After going at it multiple times, we fall asleep, wrapped in each other’s warmth.

The next morning, I wake up to a strange, ticklish sensation between my legs.
Blinking away the sleep, I look down to see someone fondling me with a dazed expression. But it’s not my girlfriend—
It’s my always-stern, overly-serious, science-major… older sister!

[Translated from [melonbooks](https://www.melonbooks.co.jp/detail/detail.php?product_id=1373739&adult_view=1)]

## Characters
### Fumika Nobuhiko (文香 宣彦)
- **Gender:** Male
- **Hair:** Brown, Short, Straight
- **Body:** Teen, Slim, Pale, Large Penis
- **Personality:** Ore, Friendly, Kind, Sister Complex
- **Role:** Full Brother, Domestic Partner, Boyfriend, Classmate, Nameable, Younger Brother, Honor Student, Eleventh Grader
- **Engages in:** Infidelity, Marriage Proposal, Pretend Wedding
- **Subject of:** Turndown

### Fumika Mari (文香 眞里)
The older sister of Nobuhiko, who is not only a university student but also a stunning beauty and a true genius. Despite her exceptional abilities, Mari struggles with socializing and has only a few close friends. When she unexpectedly swaps bodies with Nobuhiko's girlfriend at the beginning of the story, she approaches the situation with calm mind and tries to investigate the cause.

[spoiler]It is revealed that the initial body swap between Mari and Nobuhiko's girlfriend occurred a decade ago. Deeply in love with her brother, Mari once confessed her feelings, but he turned her down due to their sibling relationship. Longing for a chance to be with him, Mari made a heartfelt wish to become someone else. As a result, for ten years, the cheerful literary girl known as "Matsuri" is in fact the true Mari. On the other hand, the enigmatic scientist known as "Mari" is the one inhabiting Nobuhiko's girlfriend's body.[/spoiler]

- **Gender:** Female
- **Measurements:** Height: 168cm, Bust-Waist-Hips: 99-57-90cm, I cup
- **Hair:** Blond, Ahoge, Waist Length+, Short
- **Body:** Slim, Pale, Young-adult, Mole, Big Breasts
- **Engages in:** Cooking, Drinking, Body Swap, Turndown, Symbolic Hair Cutting, Impersonation
- **Subject of:** Amnesia, Memory Alteration, Erotic Massage, Impersonation
- **Eyes:** Violet
- **Clothes:** Glasses, Necklace, Jeans, Wedding Dress, Baseball Cap, Wedding Ring
- **Personality:** Kuudere, Otaku, Friendly, Strict, Vindictive, Honest, Brother Complex, Atashi, Curious, Jealous, Pragmatic, Bookworm, Watashi, BL Fan, Cheerful, Masculine Speech
- **Role:** Full Sister, Girlfriend, Scientist, University Student, Older Sister, Researcher
- **Voiced by:** Mizuno Nanami

### Hoshino Anna (星乃 アンナ)
- **Gender:** Female
- **Measurements:** Height: 168cm, Bust-Waist-Hips: 98-60-92cm, H cup
- **Hair:** Blond, Pink, Twin Tails, Long, Straight, Multicolored, Sidehair
- **Eyes:** Amber
- **Personality:** Pervert, Smart, Talkative, Cheerful
- **Role:** Scientist, Classmate, University Student
- **Clothes:** Sunglasses, Gyaru, Crop Top, Short Shorts
- **Engages in:** Lactation
- **Body:** Tanned
- **Voiced by:** Kanou Ichika

### Ichinose Matsuri (一ノ瀬 まつり)
The popular and friendly girlfriend of Nobuhiko and his classmate. As an honor student, she excels academically and is known for her love of books. She and Nobuhiko are in-line with another in their personality. At the beginning of the story, she unintentionally swaps bodies with Nobuhiko's older sister after she's just had her first time with Nobuhiko.

[spoiler]It is revealed that the initial body swap between Mari and Nobuhiko's girlfriend occurred a decade ago. Deeply in love with her brother, Mari once confessed her feelings, but he turned her down due to their sibling relationship. Longing for a chance to be with him, Mari made a heartfelt wish to become someone else. As a result, for ten years, the cheerful literary girl known as "Matsuri" is in fact the true Mari. On the other hand, the enigmatic scientist known as "Mari" is the one inhabiting Nobuhiko's girlfriend's body.[/spoiler]

- **Gender:** Female
- **Measurements:** Height: 162cm, Bust-Waist-Hips: 95-58-88cm, G cup
- **Hair:** Brown, Straight, Tiny Braid
- **Body:** Teen, Slim, Pale, Mole, Big Breasts
- **Engages in:** Cooking, Teasing, Body Swap, Impersonation, Pretend Wedding
- **Subject of:** Amnesia, Infidelity, Memory Alteration, Impersonation
- **Eyes:** Blue
- **Clothes:** Skirt, Hairpin, Hair Flower, Wedding Ring, Over The Knee Socks
- **Personality:** Kuudere, Otaku, Deredere, Friendly, Strict, Honest, Atashi, Curious, Jealous, Pragmatic, Bookworm, Watashi, BL Fan, Cheerful, Masculine Speech
- **Role:** Domestic Partner, Girlfriend, Classmate, Honor Student, Library Committee Member, Eleventh Grader, Ane Act
- **Items:** Bag
- **Voiced by:** Fuurin Misuzu

### Nekomata Sui (猫又 翠)
- **Gender:** Female
- **Measurements:** Height: 156cm, Bust-Waist-Hips: 102-58-87cm, J cup
- **Hair:** Brown, Ahoge, Tiny Braid, Asymmetrical Sidehair
- **Body:** Teen, Slim, Pale, Big Breasts
- **Eyes:** Green
- **Personality:** Otaku, Pervert, Reserved, Shy, Third Person, Watashi, Eccentric
- **Role:** Classmate, Bad Student, Eleventh Grader
- **Clothes:** Nekomimi Headband
- **Voiced by:** Enokizu Mao

## Shops
- [Official Website](https://www.northbox.net/products/otokano/index.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=1170905)

## Releases
### Japanese
- **2022-05-27**: Otokano ~Otouto no Kanojo ga Bunkei de Tsuyome!?~ Package Edition - [Official website](https://www.northbox.net/products/otokano/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=32338), [Melonbooks.co.jp](https://www.melonbooks.co.jp/detail/detail.php?product_id=1373739), [Getchu](http://www.getchu.com/soft.phtml?id=1170905), [DMM](https://www.dmm.co.jp/mono/pcgame/-/detail/=/cid=storeapc0011702/), [Toranoana](https://ec.toranoana.shop/tora/ec/item/210006629353/)
- **2022-05-27**: Otokano ~Otouto no Kanojo ga Bunkei de Tsuyome!?~ Download Edition - [Official website](https://www.northbox.net/products/otokano/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=32338), [DMM](https://dlsoft.dmm.co.jp/detail/hobe_0538/)

### English
- **2023-01-06**: Otokano ~Otouto no Kanojo ga Bunkei de Tsuyome!?~ - [Official website](https://sugoivisualnovel.up.railway.app/vns/34090)

### Russian
- **2025-10-15**: Otokano ~Otouto no Kanojo ga Bunkei de Tsuyome!?~ - [Official website](https://t.me/russianneirovn/72)

## Tags
ADV, Blood-related Brother/Sister Incest, Kuudere Heroine, Male Protagonist, Multiple Endings, Otaku Heroine, Heroine with Glasses, Nameable Protagonist, Nukige, Group Sex of One Male and Several Females, Under the Same Roof, Harem Ending, Unlockable Routes, Unlockable Harem Ending, Body Swapping, Only Virgin Heroines, Protagonist's Girlfriend as a Heroine, Few Choices, Siscon Protagonist, Defloration During Common Route, Long Common Route, Marriage Ending, Unlockable Hero(ine), Highly Animated Sprites, Perverted Heroine, Gyaru Heroine, Pragmatic Heroine, Protagonist's Older Sister as a Heroine, Nursing Handjob, Single Footjob, Protagonist's Full Sister as a Heroine, High School Student Heroine, Sex with Protagonist Only, Heroine with Big Breasts, Body Swapped Sex, Infidelity, Heroine with Beauty Mark, Brocon Heroine, Ahegao, University Student Heroine, Erotic Massage, Protagonist in Relationship, Adult Heroine, Heroine with Ahoge, Sexual Cosplay, Discreet Sex, Twin Tail Heroine, Lactation During Sex, Heroine with Tan Lines, Tribadism on Penis, Quickie Fix Position, Sex on a Roof, Incest Roleplay, Piledriver, Reverse Missionary, Sex at School, Deepthroat, Shy Heroine, Masturbation in front of an Audience, Sex on a Beach, Wake-up Sex, Sex in Water, Sex in Front of an Audience, Defloration, Female Ejaculation, Single Handjob, Outdoor Sex, Single Blowjob, Sixty-nine, Gokkun, Soapy Massage, Twin Boobjob, Single Boobjob, Sex in Public Places, French Kiss, Vaginal Masturbation, Bathroom Sex, Intercrural Sex, Bukkake, Cowgirl, Anal Sex, Anal Fingering, Cunnilingus, Butterfly, Doggy Style, Missionary Position, Reverse Cowgirl, Spoons, Vaginal Fingering, Sexual Blindfold, Sitting Sex, Adult Breast Sucking, Standing Sex, Erotic Spanking

## More Games from North Box
- [Elf no Oyome-san ~Harem Kon Suishou~](https://pinovel.net/v31210)
- [Otokano ~Otouto no Kanojo ga Bunkei de Tsuyome!?~](https://pinovel.net/v34090)
- [Takane no Hana to Mahou no Tsubo](https://pinovel.net/v39828)

---
*View the full details at [pinovel.net/v34090](https://pinovel.net/v34090).*

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