Zettai Saikyou ☆ Oppai Sensou!! ~Kyonyuu Oukoku vs Hinnyuu Oukoku~

ぜったい最胸☆おっぱい戦争!! ~巨乳王国vs貧乳王国~

TitleZettai Saikyou ☆ Oppai Sensou!! ~Kyonyuu Oukoku vs Hinnyuu Oukoku~
Original titleぜったい最胸☆おっぱい戦争!! ~巨乳王国vs貧乳王国~
AliasesAbsolute Best Tits ☆ The Boobs War ~Kingdom of Big Tits vs Kingdom of Small Tits~
LengthMedium (10 - 30 hours)
Developersofthouse-seal GRANDEE
Publishers AiCherry & Softhouse-Seal
 Soulhunter no Fansub
Alternative version
Oppai Sensou - Kyonyuu VS Hinnyuu -
Shops» US$ 44.95 @ J-List
» US$ 44.95 @ MangaGamer
» US$ 44.95 @ MangaGamer


Bustchest continent is at war: the Big Breasts and Flat Chest kingdoms fight to determine once and for all which size is better.
Haruto, the protagonist, loves all sizes equally. According to the Breasts God, he has a special power which can save the continent, so without a second thought, Haruto starts his quest as a breasts-loving messiah.


Hair, Black, Short
Eyes, Red
Clothes, Belt, Boots, Jacket
Items, Sword
Personality, Assertive, Carefree, Confident, Lazy, Pervert, Sloppy
Role, Childhood Friend, Father, Full Brother, Hero, King, Older Brother, Vagabond, Warrior
Engages in, Escape From Confinement, Fighting, Rape on Defeat
Subject of, Confinement, Obsessive–Compulsive Disorder
Engages in (Sexual), Inbreeding, Incest


A traveling warrior who is obsessed with touching boobs and dose not care if they are big or small.When given the title of "Savior" he decline on the spot even giving up because he considers it too hard but changes his mind when Milphalia starts crying.

Main characters

Aria Aliialia
Aria Aliialiaアリア・アリアリア 
MeasurementsHeight: 150cm, Bust-Waist-Hips: 73-53-73cm
Birthday8 June
Hair, Blue, Curly, Long, Ringlet, Side Tail, V Bangs
Eyes, Brown
Body, A Cup, Pointed Ears, Younger Appearance
Clothes, Dress, Hat, Witch Hat
Items, Bow, Wand
Personality, Childishly Violent, Curious, Energetic, Haraguro, Misanthrope, Mischievous, Protective, Short-tempered, Third Person
Role, Elf, Grandmother, Magician, Pet Owner, Queen Consort, Wife
Engages in, Polygamy
Subject of, Rape on Defeat
Engages in (Sexual), Handjob, Virgin Sex
Subject of (Sexual), Missionary
Voiced byKonoe Yuzuko


An elf who lives in the forest with Nico and is the Flat Chest Tribe’s Maiden.

To the untrained eye, without a good grasp of Elf life spans and aging, she appears to be quite young; but she’s easily over a thousand years old.

Normally she acts hyper and girly, but she gets mad when her age is mentioned. Despite her age, she has a rather mischievous personality.

She dotes on Nico as if she were her grandchild, but she doesn’t like being called ’Grandma.’ She keeps trying to get people to call her Aria-chan, but it doesn’t seem to be working.

From MangaGamer

Chocolat Collation
Chocolat Collationショコラ・コレーション 
AliasesLuna Soltiras
MeasurementsHeight: 152cm, Bust-Waist-Hips: 74-54-74cm
Birthday14 February
Hair, Ahoge, White
Eyes, Pink
Body, B Cup
Clothes, Cape, Dress, Fingerless Gloves, Maid's Dress, Maid's Headdress
Personality, Chuunibyou, Clumsy, Hetare, Overconfident
Role, Childhood Friend, Magician, Maid, Mother, Queen Consort, Rival, Submissive Partner, Wife
Engages in, Duel, Polygamy
Subject of, Rape on Defeat, Weakness
Engages in (Sexual), Blowjob, Group Sex, Outdoor Sex, Virgin Sex
Subject of (Sexual), Boobs on Glass, Cunnilingus, Doggy Style, Missionary
Voiced bySatou Haruka


A girl with a bad case of adolescent delusions who suddenly appears before Haruto and the others.

Her entrance was accompanied by a grave atmosphere and she can use some flashy magic, so at first Haruto and the others thought she might be the final boss; but really, she’s Iris’s maid.

The only magic she knows how to use is impressive at first glace, but ultimately merely for show. She’s easily the weakest character in the game.

But not only is she Iris’s maid, she’s also a talented Flat Chest chef.

She repeatedly appears before Haruto on her mission to find Iris.

From MangaGamer

Chry Santhemum
Chry Santhemumクリュー・サンテムム 
MeasurementsHeight: 164cm, Bust-Waist-Hips: 83-55-85cm
Birthday2 January
Hair, Ponytail, Red
Eyes, Violet
Body, D Cup
Clothes, Dress, Hairpin
Role, Antagonist, Commander, Princess
Engages in (Sexual), Anal Sex
Voiced byMisonoo Mei


The princess of the Carsilian Empire.

From MangaGamer

Estraea Munnue Piequartz
Estraea Munnue Piequartzエストレア・マニュー・パイクォーツ 
MeasurementsHeight: 162cm, Bust-Waist-Hips: 103-58-89cm
Birthday10 March
Hair, Pink, Red, Twin Tails
Eyes, Amber
Body, H to M Cup, Inverted Nipples
Clothes, Gloves, Hair Ribbon
Items, Whip
Personality, Altruistic, Charismatic, Low Self-esteem, Mature, Pretending, Relaxed, Sly, Smart, Wise
Role, Commander, Dominant Partner, Princess, Queen Consort, Queen Regnant, Submissive Partner, Warrior, Wife
Engages in, Dancing, Fighting, Polygamy, Sadism, Self-sacrifice, Whipping
Subject of, Kidnapping, Molesting, Rape, Rape on Defeat
Engages in (Sexual), Boobjob, Cowgirl, Footjob, Group Sex, Sitting Sex, Triple Boobjob, Twin Boobjob, Virgin Sex
Subject of (Sexual), Doggy Style, Missionary, Nipple Insertion, Nipple Sucking, Piledriver, Seventh Posture, Tominagi
Voiced byIino Shiori


The princess who rules Piequartz. As one might expect from the Big Breast Tribe’s princess, her boobs are huge.

She’s smart, beautiful, charismatic, and young, yet said to be the finest ruler in generations.
She has a gentle smile and is popular among her people.
But that gentle smile is but a facade for the outside world; in reality, she’s a sadist who loves toying with people.

Even as a princess, she fights on the front lines, using her beloved whip to bully people until they break.
Those soldiers who experience it are traumatized enough to never appear on the battlefield again.

At first glance she seems perfect, but she has a big complex about her chest.

From MangaGamer

Cup size: I

Iris Milla Serpettane
Iris Milla Serpettaneイリス・ミリャ・サーペッタン 
MeasurementsHeight: 144cm, Bust-Waist-Hips: 70-49-70cm
Birthday4 October
Hair, Blond, Spiky Bangs, V Bangs, Waist Length+
Eyes, Green, Tsurime
Body, AA Cup, Kid, Pale, Slim
Clothes, Boots, Corset, Dress, Ribbon Hair Accessory
Personality, Classic Tsundere, Family Oriented, Food Lover, Ignorant, Loyal, Naive, Spoiled, Stubborn
Role, Comrade, Daughter, Princess, Queen Consort, Runaway, Wife
Engages in, Polygamy
Subject of, Confinement, Kidnapping, Molesting
Engages in (Sexual), Cowgirl, Footjob, Group Sex, Masturbation, Naizuri, Vaginal Fingering, Virgin Sex
Subject of (Sexual), Anal Sex, Doggy Style, Missionary, Spoons, Vaginal Fingering
Voiced byOkuyama Ayumi


Cup size: AAA

A Flat Chest girl who is traveling with Haruto.

She’s actually a Serpettane princess, but she is hiding her true identity from Haruto and the others.

She has an appetite bigger than her tiny body.
She has a terrible sense of direction, so if you take your eyes off her for a second, she’ll get lost.

Since she was very sheltered and hadn’t really been out of the castle, she’s quite ignorant of the outside world.

She abides by her late father’s teachings and is hostile to the Big Breast Tribe.

Flat Chests are said to be sensitive, so her super-flat chest is super-sensitive. She’ll cum just from having her nipples played with.

From MangaGamer

MeasurementsHeight: 156cm, Bust-Waist-Hips: 78-55-74cm
Birthday15 April
Hair, Black, Ponytail, Sidehair, V Bangs, Waist Length+
Eyes, Red
Body, Average Height, C Cup, Pale, Teen
Clothes, Hair Flower, Kimono, Thigh-high Stockings
Items, Katana
Personality, Brocon, Hardworker, Kind, Refined
Role, Full Sister, Hero, Mother, Queen Consort, Wife, Younger Sister
Engages in, Fighting, Polygamy
Subject of, Inferiority Complex, Split Personality
Engages in (Sexual), Boobjob, Group Sex, Inbreeding, Incest, Masturbation, Sex in Water, Sixty-nine, Triple Boobjob, Virgin Sex
Subject of (Sexual), Missionary, Piledriver
Voiced byMisonoo Mei


Haruto’s average-breasted younger sister who lives in his home town.
Because the Average Chests are of low social standing among both the Big Breast and Flat Chest tribes, the Average Chests have gathered in that isolated village to escape them.

She’s extremely polite, so much so that it’s hard to believe she’s Haruto’s sister.

She’s terrifyingly strong and is better with a sword than Haruto, but she loves her brother dearly and works hard every day to catch up to him.

She saves the enslaved Average Chests, but both countries have put bounties on her head and nicknamed her the ”Scarlet Crow.”

She has a complex about her average-sized chest.

From MangaGamer

Lumha Howard
Lumha Howardルーミャ・ハワワード 
MeasurementsHeight: 160cm, Bust-Waist-Hips: 88-57-83cm
Birthday4 May
Hair, Braid, Green
Eyes, Amber
Body, E+ Cup
Clothes, Fingerless Gloves, Spaulders, Thigh-high Stockings
Items, Lance
Personality, Flustered, Loyal, Patriotic, Rude, Strange, Timid
Role, Prison Guard, Security Guard, Soldier
Engages in, Duel, Fighting
Subject of, Confinement, Molesting, Whipping
Engages in (Sexual), Cowgirl, Twin Boobjob, Virgin Sex
Subject of (Sexual), Doggy Style, Intercrural Sex
Voiced byHarukawa Akari


A soldier in the Piequartz army who serves Estraea.

She has a timid and cowardly over-polite manner of speaking, but when faced with someone she doesn’t like, she has an impressive grasp of sarcastic yet polite speech.

She’s thoroughly faithful to the Big Breast faith, so naturally she looks down on flat and average chests.

She’s timid, but immensely powerful as a soldier.
She’s terrified to the core of Estraea’s punishments.

She has a variety of jobs, including gatekeeper and jail guard, and encounters Haruto’s party in a variety of situations.

From MangaGamer

Milphalia Ur Urrila
Milphalia Ur Urrilaミルファリア・ウル・ウルリラ 
MeasurementsHeight: 158cm, Bust-Waist-Hips: 97-57-89cm
Birthday29 November
Hair, Orange
Eyes, Blue
Body, E+ Cup
Clothes, Dress, Hair Ribbon
Personality, Altruistic, Cheerful, Deredere, Emotional, Flustered, Hardworker, Kind, Loyal, Naive
Role, Comrade, Empress Consort, Miko, Mother, Sex Friend, Submissive Partner, Wife
Engages in, Drinking, Lactation, Polygamy
Engages in (Sexual), Bathroom Sex, Boobjob, Cowgirl, Doggy Style, Group Sex, Handjob, Masturbation, Outdoor Sex, Virgin Sex
Subject of (Sexual), Adult Breast Feeding, Boobs on Glass, Missionary, Nipple Insertion, Nipple Sucking, Piledriver, Standing Sex
Voiced byKonoha


The Big Breast Maiden who was made to become Haruto’s ”Personal Boobs” by order of the breast deities. She is traveling with Haruto.

She may be the Maiden who worships the Big Breast Deity, but she believes in the teachings of the days before the continent was split: that there is no reason to discriminate based on breast size.

She has a cheerful, soft-hearted personality, can’t even imagine doubting a soul, and gives her all to whatever she does.

Because she’s descended from a long line of Big Breast Maidens, she produces milk when she becomes sexually aroused. Haruto squeezes her boobs every day, but she tries her best not to let it out.

From MangaGamer

MeasurementsHeight: 147cm, Bust-Waist-Hips: 90-53-77cm
Birthday6 December
Hair, Kemonomimi, White
Eyes, Violet
Body, E+ Cup, Tail
Personality, Docile, Family Oriented, Jealous, Naive, Shy, Third Person, Timid
Role, Betrothed, Daughter, Full Sister, Non-blood-related Daughter, Older Sister, Queen Consort, Wife, Wolf
Engages in, Polygamy
Subject of, Child Abandonment, Inferiority Complex
Engages in (Sexual), Blowjob, Boobjob, Group Sex, Outdoor Sex, Triple Boobjob, Virgin Sex
Subject of (Sexual), Doggy Style
Voiced byKatakura Hina


A girl who was abandoned in the forest and raised by a giant white wolf-fox.
She calls the creature ”Mama” and they live happily together.

She’s of the Flat Chest Tribe, but for some reason, she has big breasts, and ears and a tail just like her Mama.

She’s scared of humans and lives hidden away, but she calls Aria ”Grandma” and loves her dearly.
Curiously, Mama got attached to Haruto, so Nico calls him ”Papa” and became attached to him.

She’s heard about animals mating from Aria, so she knows the basics of how babies are made. She thinks she shouldn’t be mating with Haruto, but...

From MangaGamer

Tiara Firo Serpettane
Tiara Firo Serpettaneティアラ・フィロ・サーペッタン 
MeasurementsHeight: 155cm, Bust-Waist-Hips: 72-55-75cm
Birthday8 August
Hair, Blond
Eyes, Blue
Body, AA Cup
Clothes, Dress, Gloves
Items, Greatsword
Personality, Kind, Serious, Smart
Role, Commander, Mother, Queen Regnant, Widow
Engages in, Fighting, Planning
Engages in (Sexual), Sex with Others
Voiced byHimari


Iris’s mother and queen of Serpettane.

She gives off a cool aura and is a stickler for the rules, but normally she’s a kind and gentle person.

Her husband, the king, has already passed away, and she’s managing the kingdom all by herself.

She doesn’t care for war, but she fights out of a strong sense of duty to her country and people.

Unlike Estraea, she does not appear on the front lines. But she’s a skilled tactician, giving precise orders from the back lines. Her soldiers have a deep respect for and trust in her.

From MangaGamer

Side characters

MeasurementsHeight: 39cm, Bust-Waist-Hips: 73-55-71cm
Body, E+ Cup
Role, Deity, Dragon
Engages in, Fighting
Voiced byHimari


Big Breast Tribe's Breast Deity
<hidden by spoiler settings>Its revealed that the whole reason for the war is due to a fight between Boweene and Petan over Boweene eating Petan pudding while Petan ate Boweene cake staring the the war but known to everyone Boweene and Petan madeup but due to there energy they used they went to slept for a thousand years and so the war Between the big and small tribes continue on. Only Haruto,Milphalia,and Iris know the truth and so they send Haruto and Milphalia to stop the war. They make Milphalia, Haruto "personal boob" [spoiler]

From MangaGamer

MeasurementsHeight: 293cm
Role, Non-blood-related Mother, Wolf
Voiced byKatakura Hina
MeasurementsHeight: 39cm, Bust-Waist-Hips: 60-52-47cm
Body, AA Cup
Role, Deity, Dragon
Voiced bySatou Haruka


Flat Chest Tribe's Breast Deity

From MangaGamer
<hidden by spoiler settings>Its revealed that the whole reason for the war is due to a fight between Boweene and Petan over Boweene eating Petan pudding while Petan ate Boweene cake staring the the war but known to everyone Boweene and Petan madeup but due to there energy they used they went to slept for a thousand years and so the war Between the big and small tribes continue on. Only Haruto,Milphalia,and Iris know the truth and so they send Haruto and Milphalia to stop the war. They make Milphalia, Haruto "personal boob" [spoiler]