Otonari Koi Sensou!


TitleOtonari Koi Sensou!
Original titleおとなり恋戦争!
LengthMedium (10 - 30 hours)
DeveloperSugar House
PublishersSugar House & Moe App
Shops» JP¥ 2640 @ DLsite (jpn)


Yui and Suzuka lived next door to Yuuto and they’ve been together since they were born. They often fought over him and made promises to marry him when they grew up. He thought these happy times together would last forever, but they came to an end when Suzuka moved away.

Many years later, they re-appeared in front of his door. However, their love battle for him isn’t only limited to the two of them now, with his imouto-like neighbour Hotaru, lively kouhai Yuzu who calls him ‘oniichan’, and the respected daughter of the school chairman Manami also joining the fray. Surrounded on all sides, there’s no place to hide!?

[From Hau~ Omochikaeri!]

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Main characters

Aihara Yuzu藍原 ゆず
MeasurementsHeight: 149cm, C cup
HairPink, Shoulder-length
BodyAverage Height, Pale, Slim, Teen
ClothesHairpin, Knee-high Socks, Ribbon Tie, School Uniform
PersonalityBoku, Energetic, Third Person
RoleHigh School Student, Imouto Act, Kouhai
Voiced byMomoya Minami


An energetic girl, but for some reason she refers to the protagonist as "Onii-chan". She seems to have known the protagonist from before, but she refuse to remind him until the protagonist remembers for himself. She often competes with Hotaru for the position of the protagonist's 'imouto'.

Akamine Yui赤峰 優衣
MeasurementsHeight: 155cm, E cup
HairRed, Side Tail, Straight, Waist Length+
BodyAverage Height, Big Breast Sizes, Pale, Slim, Teen
ClothesHair Tie, Ribbon Tie, School Uniform, Thigh-high Stockings
PersonalityDeredere, Possessive
RoleChildhood Friend, High School Student, Neighbor
Voiced byOgura Yui


The protagonist's neighbor and childhood friend. She loves the protagonist to the point where she sets wiretaps in his room and monitors his actions, but she can't be straight with the protagonist about this bad habit.

Aoi Suzuka葵 涼華
MeasurementsHeight: 160cm, F cup
HairBlack, Straight, Waist Length+
BodyAverage Height, Big Breast Sizes, Pale, Slim, Teen
ClothesKnee-high Socks, Ribbon Tie, School Uniform
RoleChildhood Friend, High School Student
Engages inTeasing
Voiced byTamiyasu Tomoe


The protagonist's other childhood friend. She competes with Yui as a love rival for the protagonist, but despite that the relationship between the three of them are still very good. A very mischievous girl, she likes teasing the protagonist. When she comes to with an unexpected situation, she will lose her cool very quickly.

Koto Manami古都 真奈美
MeasurementsHeight: 157cm, D cup
HairBrown, Straight, Waist Length+
BodyAverage Height, Pale, Slim, Teen
ClothesHeadband, Pantyhose, Ribbon Tie, School Uniform
PersonalityKind, Naive
RoleHigh School Student, Popular
Voiced byAri Suzuha


Daughter of the school chairman. A very kind girl, she is an honor student and the ideal figure of every boy in the school. She is in love with the protagonist and won't stop making moves on him.

Shirakawa Hotaru白川 蛍
MeasurementsHeight: 139cm, AAA cup
HairLong, Twin Tails, White
BodyPale, Short, Slim, Small Breast Sizes, Teen
ClothesKnee-high Socks, Ribbon Hair Tie, Ribbon Tie, School Uniform
RoleHigh School Student, Kouhai, Neighbor
Voiced byYuina


She is one year younger than the protagonist and is like an imouto to him who lives across the street. She has the spare keys to the protagonist's house, and will often sneak into his bed to sleep with him.

Side characters

Sasaki Kyouko佐々木 京子
HairBrown, Shoulder-length, Straight
BodyPale, Slim, Teen
ClothesGlasses, Knee-high Socks, Ribbon Tie, School Uniform
RoleClass President, High School Student, Student Club President
Voiced byUeda Akane


The protagonist's class representative, everyone just call her "class rep". She takes everything she does seriously, but sometimes she is a little unreasonable.

Shirakawa Harue白川 春江
HairWaist Length+, White
BodyPale, Slim, Young-adult
ClothesApron, Pantyhose, Ribbon Hair Tie, Skirt
Voiced byTachibana Mao


Hotaru's mother. Her age is unknown (looks to be really young). She is the landlady of the apartment complex where she lives. She watches over the protagonist and her daughter's relationship with a smile.