---
title: "Brothers ~Koi Suru Onii-sama~"
description: "The protagonist Nanase Suzuna is a very normal college student. Her father died when she was a child, but suddenly one day her mother introduced her to the pers"
image: "https://t.vndb.org/cv/95/143395.jpg"
---

# Brothers ~Koi Suru Onii-sama~

![Brothers ~Koi Suru Onii-sama~](https://t.vndb.org/cv/95/143395.jpg)

**Alternative Title:** ブラザーズ～恋するお兄さま～

**Developer:** Tiaramode

**Release date:** Sep 28, 2007

**Platform:** Windows

**Language:** Japanese

**Rating:** 6.5/10 (32 votes)

## Description
The protagonist Nanase Suzuna is a very normal college student. Her father died when she was a child, but suddenly one day her mother introduced her to the person she was going to get remarried to. Because of her mother's happy smile and how nice her new father seemed Suzuna approved of the marriage and she prepared to move into her new fathers house but...

On the day of the move, at the imposing gated mansion, she learned that her new father had four sons! Suzuna was shocked! More than that, her mother and new father were going away for a week and leaving her to live alone with her four new brothers (and their servant Kageyama) under the same roof.

Then Suzuna received a proposal from those brothers.
    "If you can make us approve of you as our little sister within one week, we'll bless those two's marriage."
She hoped for her parent's happiness so Suzuna happily accepted but...
In truth the brothers already objected to the marriage, little did Suzuna know but to them this was just the start of another game.
    "How about we bet on which one of us brothers Suzuna will fall for first?"

It's one week until her father and mother come back, will Suzuna be able to protect herself!?
Will she be able to build sibling bonds with her new brothers!?
What is the true nature of Kageyama who is always watching over the five of them!?

Now this skillfully dangerous battle of one little sister VS four big brothers + one man will start――!

[Translated from the official site]

## Characters
### Nanase Suzuna (七瀬 鈴音)
She started attending university in spring, Suzuna lost her father due to a car accident when she was 7. Since then, she has been living with just her mother. She does all of the housework in order to help out her mother, since she's hard at work. Though cheerful and energetic, Suzuna is firm and self-assured. Her dream is to become a primary school teacher once she graduates university. Because being able to play the piano is essential in her course, Suzuna practices it. However, since she dislikes musical studies, her piano-playing is catastrophically bad. 

On the day she found out she passed her university entrance exams, she was introduced to her new father. Since she thinks he seems like a nice man, and her mother looks so happy, Suzuna supports their marriage, but... because of the payments required for her new university, her family became unable to pay for the apartment they live in. To help, her new father suggested that she and her mother move in with his family.

[Translation of the [URL=http://www.tiaramode.com/brothers/characters.html]official website's character profiles[/URL].]

- **Gender:** Female
- **Measurements:** Height: 156cm
- **Hair:** Brown, Long, Spiky Bangs
- **Body:** Pale, Young-adult
- **Clothes:** Sweater, Miniskirt, Thigh-high Stockings, Tank Top, Garter, Choker
- **Personality:** Hard Worker, Outgoing, Friendly, Kind, Energetic, Brother Complex, Optimist
- **Engages in:** Cooking, Cleaning
- **Eyes:** Violet
- **Role:** Daughter, Step Sister, Student Club Member, Cheerleader, University Student, Nameable, Non-blood-related Daughter, Half-orphan, Younger Sister
- **Voiced by:** Suzushiro Chacha

### Kageyama Satofumi (影山 聡史)
Losing his mother when he was 7, Satofumi was taken in by the Kasuga household to look after the brothers and is like a secretary to Takafumi. It's his job to take care of everything around the Kasuga household, from financial allocations all the way to laundry. It's not an understatement to say that without Satofumi, the Kasuga family would be all over the place and hardly anything would ever get done. Though he listens to the demands and requests of the Kasugas without objection, he isn't afraid of offering candid advice when in the situation calls for it.

Since he studied overseas in the U.S., he is proficient in English, and incidentally, French. With extensive knowledge in the martial arts, he also functions as the brothers' bodyguards... However, as tough as he looks and comes across, he does have one crucial weakness- Satofumi is a hemophobia, and can potentially faint at the sight of blood. Always seen with his black suit and sunglasses, Satofumi is silent, serious and very diligent in his work.

[spoiler]He is actually Takafumi's first son; his mother being a lady that Takafumi wasn't permitted to marry. As a result, he is the oldest brother.[/spoiler]

[Translation of the [URL=http://www.tiaramode.com/brothers/characters.html]official website's character profiles[/URL].]

- **Gender:** Male
- **Measurements:** Height: 187cm
- **Hair:** Shoulder-length, Green
- **Body:** Pale, Young-adult, Muscular, Scar, Tall
- **Personality:** Hard Worker, Refined, Kind, Loyal, Serious, Mature
- **Engages in:** Swordsmanship, Cooking, Driving, Martial Arts, Cleaning, Gardening, Flirting, Shopping
- **Eyes:** Grey
- **Clothes:** Kimono, Suit, Necktie, Sunglasses
- **Role:** Son, Step Brother, Butler, Bodyguard, Secretary, Half-orphan, Host(ess), Older Brother, Half-brother
- **Voiced by:** Ichijou Kazuya

### Kasuga Setsuto (春日 雪斗)
With his soft demeanor and smile, second-oldest Setsuto is the type of guy that everyone feels like they can trust and drop their guards around. However, despite outward appearances, he's dark, calculating and tends to say venomous things with a gentle smile. Possibly because of this "dark" side of him, his brothers all agree that Setsuto is the scariest when angered. Setsuto is a borderline-aichmophobiac (fear of sharply-pointed objects), and cowers at the sight of knives and needles; sometimes even nearing panic attacks.

Since his school days, Setsuto has been working as a model for magazines. After graduation, he got into the acting industry, and has began a career as an actor alongside his modelling jobs. Upon being selected out many in his breakthrough movie last year, he has become a promising regular in a serial TV drama.

He decides nearly everything he does based on how "fun" he finds it (or not), and greatly enjoys playing with other people's feelings. However, that side of him is rarely apparent, and he never shows his true feelings. Evident in his approval of his father's desire to remarry, Setsuto is the maturest out of the four Kasuga brothers.

[Translation of the [URL=http://www.tiaramode.com/brothers/characters.html]official website's character profiles[/URL].]

- **Gender:** Male
- **Measurements:** Height: 178cm
- **Hair:** Blond, Shoulder-length, Mullet, Spiky Bangs
- **Body:** Pale, Young-adult
- **Clothes:** Trousers, Earrings, Jacket, T-shirt, Sunglasses, Pendant Necklace
- **Eyes:** Green
- **Personality:** Pervert, Selfish, Friendly, Relaxed, Mature, Mischievous, Haraguro, Charismatic
- **Role:** Son, Step Brother, Non-blood-related Son, Actor, Popular, Famous, Half-orphan, Younger Brother, Older Brother, Model, Half-brother
- **Voiced by:** Takatori Rei

### Kasuga Souichirou (春日 総一郎)
Raised by his strict grandparents as the heir to the Kasuga family, Souichirou is the rigid and serious oldest brother. He works as a surgeon for a hospital affiliated by a national university. Highly skilled in his area, great things are expected of him in the future. When he was 18, the Kasuga household collapsed. Even now, he still almost stubbornly adheres to the ancient traditions of the Kasuga family. 

Because of the old Kasuga view of how "only those who are of suitable blood may join us", Souichirou is strongly against his father's desire to remarry Suzuna's mother. As a result, he openly shows his hostility even towards Suzuna. Souichirou is a perfectionist obsessed with cleanliness. He is strict with himself as well as everyone around him. Selfish and sometimes pompous, Souichirou thinks that women are "vulgar and good-for-nothing creatures."

[Translation of the [URL=http://www.tiaramode.com/brothers/characters.html]official website's character profiles[/URL].]

- **Gender:** Male
- **Measurements:** Height: 183cm
- **Hair:** Blue, Ahoge, Short, Spiky Bangs
- **Body:** Pale, Young-adult
- **Clothes:** Trousers, Glasses, Necktie, Shirt, Belt, Lab Coat, Ceremonial Japanese Clothing
- **Personality:** Hard Worker, Selfish, Strict, Arrogant, Kind, Stubborn, Smart, Perfectionist, Loyal, Serious, Confident, Old-fashioned, Mature, Misogynist
- **Engages in:** Swordsmanship, Driving, Kendo
- **Eyes:** Blue, Hosome
- **Items:** Katana
- **Role:** Son, Step Brother, Medical Doctor, Non-blood-related Son, Half-orphan, Younger Brother, Older Brother, Half-brother
- **Voiced by:** Mibu Roushi

### Kasuga Subaru (春日 昂)
A third-year undergraduate art student, second-youngest Subaru goes to the same university as Suzuna, Yoshitaka and Mai. Though an extremely shy person that closes his heart off to most, he actually behaves like a child around the right people. Since he is unable to sleep alone at night, he sometimes crawls into one of his brothers' beds. At the moment, he's the "pet" of an older female jewellery designer, so he only comes home when he feels like it.

A prodigious, virtuoso pianist, Subaru has won a myriad of related awards and prizes. Unfortunately, since he injured his hand last year, he lost his ability to play the piano in front of those he doesn't know. He's always seen with his beloved pet chameleon, "Berry", who he found in a park.

[Translation of the [URL=http://www.tiaramode.com/brothers/characters.html]official website's character profiles[/URL].]

- **Gender:** Male
- **Measurements:** Height: 179cm
- **Hair:** Black, Shoulder-length, V Bangs
- **Body:** Pale, Young-adult
- **Engages in:** Cooking
- **Eyes:** Grey, Hosome
- **Clothes:** Suit, Earrings, Jacket, Necklace, Belt, Ring, Bow Tie, Watch, Pendant Necklace
- **Personality:** Kuudere, Stoic, Reserved, Shy, Distrustful, Nature Lover, Immature, Emotional, Taciturn
- **Role:** Son, Step Brother, Musician, University Student, Pianist, Non-blood-related Son, Pet Owner, Half-orphan, Younger Brother, Older Brother, Half-brother
- **Subject of:** Blindness, Hospitalization
- **Voiced by:** Taniyama Kishou

### Kasuga Yoshitaka (春日 由鷹)
Even though he's surrounded by his three strong brothers (and often gets the short end of the stick), the soccer-loving youngest brother, Yoshitaka, remains cheerful and straightforward. He attends the same university as Suzuna, Subaru and Mai, and is a first year. He was in the same class as Suzuna for three years in high school, and has even ended up undertaking the same lectures as her in university. The two share a inseparable relationship.

He used to have one-sided feelings for Suzuna... that is, until his father announced his intention to remarry Suzuna's mother; making him Suzuna's step older brother. He still somewhat remains in shock of the announcement. Since the Kasuga household collapsed when he was just 9 years old, Yoshitaka attended a normal, public middle and high school. As a result, he's the only one out of his brothers that have experienced life amongst "normal, middle-class people."

In high school, he was the trusted captain of its soccer club, and even competed on a national level. In fact, he is so good at soccer that Yoshitaka has been approached by professionals seeking contracts. When Kageyama isn't around, Yoshitaka is forced to do the cooking, cleaning and laundry... however, he has absolutely no talent in housework.

[Translation of the [URL=http://www.tiaramode.com/brothers/characters.html]official website's character profiles[/URL].]

- **Gender:** Male
- **Measurements:** Height: 180cm
- **Hair:** Red, Short, Multicolored, Spiky Bangs
- **Body:** Pale, Young-adult, Muscular
- **Clothes:** Trousers, Necklace, T-shirt, Gloves, Sports Shoes, Belt, Hoodie, Helmet, Goggles, Sports Uniform
- **Engages in:** Soccer, Driving
- **Personality:** Hotblooded, Classic Tsundere, Energetic, Emotional
- **Role:** Son, Step Brother, Friend, School Sports Club Member, University Student, Non-blood-related Son, Half-orphan, Younger Brother, Older Brother, Part-time Worker, Half-brother
- **Eyes:** Garnet, Tsurime
- **Voiced by:** Kawada Shinji

### Fujimoto Mai (藤本 麻衣)
Suzuna's friend from high school. She's quick to follow fads, and loves good-looking guys. She's also in the cheerleading club alongside Suzuna.

[Translation of the [URL=http://www.tiaramode.com/brothers/characters.html]official website's character profiles[/URL].]

- **Gender:** Female
- **Hair:** Brown, Long, Wavy, No Bangs, Parted in Middle
- **Body:** Slim, Pale, Young-adult
- **Eyes:** Blue, Tareme
- **Clothes:** Earrings, Belt, Tank Top, Hairpin, Pendant Necklace, Flower, Brooch
- **Personality:** Outgoing, Superficial
- **Role:** Friend, Student Club Member, Cheerleader, University Student
- **Engages in:** Not Sexually Involved
- **Voiced by:** Nishino Miku

### Kasuga Takafumi (春日 高史)
Takafumi is always smiling, and hates arguing. He loves his sons to no end, and is proud of all four of them. He believes that his sons are good boys. He loves kids in general, and works as an author writing books geared towards primary school students.

[Translation of the [URL=http://www.tiaramode.com/brothers/characters.html]official website's character profiles[/URL].]

- **Gender:** Male
- **Aliases:** Papa, パパ
- **Hair:** Blond, Short
- **Body:** Pale
- **Eyes:** Green, Itome
- **Clothes:** Kimono, Ceremonial Japanese Clothing
- **Personality:** Friendly, Relaxed, Refined, Kind, Pacifist
- **Role:** Husband, Widower, Father, Writer, Non-blood-related Father
- **Engages in:** Not Sexually Involved
- **Voiced by:** Natsuda Sora

### Nanase Haruka (七瀬 遥)
Suzuna's mother, Haruka is a florist that was widowed when Suzuna was 7. From then on, she has raised Suzuna all by herself without any assistance. She is an easygoing and kind lady with a strong will.

[Translation of the [URL=http://www.tiaramode.com/brothers/characters.html]official website's character profiles[/URL].]

- **Gender:** Female
- **Aliases:** Mama, ママ
- **Hair:** Brown, Long, Wavy, Parted in Middle
- **Body:** Pale
- **Engages in:** Cooking, Cleaning, Not Sexually Involved
- **Eyes:** Green
- **Clothes:** Apron, Earrings, Necklace, Shirt, Ring
- **Personality:** Carefree, Friendly, Relaxed, Kind, Stubborn
- **Role:** Wife, Widow, Mother, Non-blood-related Mother
- **Voiced by:** Sagami Makoto

## Shops
- [Official Website](http://www.tiaramode.com/brothers/)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ006701.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=732099)

## Releases
### Japanese
- **2007-09-28**: Brothers ~Koi Suru Onii-sama~ - [Official website](http://www.tiaramode.com/brothers/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=9402), [Getchu](http://www.getchu.com/soft.phtml?id=425725)
- **2007-10-26**: Brothers ~Motto Koi Suru Onii-sama~ - [Official website](http://www.tiaramode.com/brothers/motto_bro.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=9617), [Getchu](http://www.getchu.com/soft.phtml?id=425706)
- **2011-12-16**: Brothers ~Koi Suru Onii-sama~ Download Edition - [Official website](http://www.tiaramode.com/brothers/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=9402), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0060929/)
- **2011-12-16**: Brothers ~Motto Koi Suru Onii-sama~ Download Edition - [Official website](http://www.tiaramode.com/brothers/motto_bro.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=9617), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0060928/)
- **2012-03-23**: Brothers ~Koi Suru Onii-sama & Motto Koi Suru Onii-sama~ - [Official website](http://www.tiaramode.com/brothers/), [Getchu](http://www.getchu.com/soft.phtml?id=732099)
- **2012-03-23**: Brothers ~Koi Suru Onii-sama & Motto Koi Suru Onii-sama~ Download Edition - [Official website](http://www.tiaramode.com/brothers/), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ006701.html), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0064704/), [DMM](https://dlsoft.dmm.co.jp/detail/eants_0079/)

## Tags
Sexual Content, ADV, University, Non-blood-related Brother/Sister Incest, Romance, Female Protagonist, Protagonist with Voice Acting, Adult Protagonist, Modern Day, Drama, Multiple Endings, Mother Support Character, Nameable Protagonist, Modern Day Japan, Map Movement, Group Sex of One Female and Several Males, Otome Game, Protagonist with a Face, Remote-controlled Vibrator, Sex in Public Places, Pre-rendered 3D Backgrounds, Wedding, Missionary Position, Blowjob, Avoidable Rape, Adult Hero, Musician Hero, Athlete Hero, University Student Protagonist, More Than Seven Endings, Romancing a Family, Butler Hero, Doggy Style, Oyaji Hero, Siscon Support Character, Outdoor Sex, Fingering, Actor Hero, Threesome Ending, Medical Doctor Hero, University Student Hero, Protagonist's Non-blood-related Brother as a Hero, Wealthy Hero, Model Hero, Brocon Support Character, Hero with Sexual Experience, Brocon Protagonist, Siscon Hero, Mirror Sex, Half-orphan Hero, Half-orphan Protagonist, Bathroom Sex, Protagonist with a Sprite, School Sports Club Member Hero, Only Adult Heroes, Softcore, Only Protagonist's Brothers as Hero(es), Multiple Protagonists

## More Games from Tiaramode
- [Butlers ~Meshimase Ojou-sama~](https://pinovel.net/v2083)
- [Brothers ~Koi Suru Onii-sama~](https://pinovel.net/v2384)
- [Royals ~Itoshi no Ouji-sama~](https://pinovel.net/v7117)
- [Crazy★Rabbits -Wakaresasegyou no Usagiri Jimusho-](https://pinovel.net/v2742)

---
*View the full details at [pinovel.net/v2384](https://pinovel.net/v2384).*

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