Report an issue on this page.



Original titleせんすいぶ!
Aliases戦水部, Sensuibu!
LengthLong (30 - 50 hours)
LinksWikidata, VNStat
Shops» JP¥ 8171 @ DLsite (jpn)


In this country where it’s slightly warmer due to global warming, the hottest thing is a new female-only water sport called "sensui", where girls ride torpedo-like high-performance mini-subs called ‘MAV’s and try to knock down their opponents by shooting special water attacks at them. The sensui team at Aosaki Academy doesn’t have enough members nor do they perform well in competitions. However, the club leader Maasa is determined to turn around the fortunes of the school by enlisting a sensui ace Mito to the team. The four girls (Mito, Alice, Maasa, Rikoko) are managed by a male coach, Riku, whose dream of becoming a sensui player was dashed due to the gender restriction. Together, they aim to compete and win the national competition, the Wassergrahl.

[From Hau~ Omochikaeri!]

Hide spoilersShow minor spoilersSpoil me! | Show sexual traits


Hasemi Riku長谷見 陸A
AliasesUkifune Riku, うきふね りく
MeasurementsHeight: 176cm
HairBlue, Short, Spiky
EyesBlue, Tsurime
BodyAverage Height, Muscular, Pale, Teen, Trap
ClothesJacket, School Uniform, Swim Shorts, Watch
PersonalityRefined, Serious, Smart
RoleClassmate, Coach, Famous, High School Student, Schoolmate, Senpai
Engages inCompetition, Cross-dressing, Disguise, Sports, Swimming


The protagonist and the club's coach. He is the true identity of the well-known swimmer called "Ukifune Riku", but quit his career after having his dream broken.

Main characters

Arishe Fujinohaアリーシェ・藤葉A
AliasesAlice Fujinoha
MeasurementsHeight: 145cm, Weight: 40kg, Bust-Waist-Hips: 76-55-77cm
HairBlond, Sidehair, Spiky Bangs, Twin Tails, Waist Length+
EyesBlue, Tsurime
BodyAverage Height, Pale, Short, Slim, Teen
ClothesBikini, Hat, Kemonomimi Headband, Ribbon Hair Tie, Ribbon Tie, Sailor School Uniform, School Swimsuit, School Uniform, Sports Swimsuit, Sweater, Thigh-high Stockings
PersonalityLow Self-esteem, Short-tempered, Tsundere, Violent
RoleClassmate, German, Half-Japanese, High School Student, Kouhai, School Swimming Club Member, Transfer Student
Engages inAthletics, Competition, Reading, Swimming
Subject ofBullying, Inferiority Complex
Voiced byUeda Akane


Aptitude Style: Sprinter
Hobbies: Reading (manga)
Likes: Udon
Dislikes: Her family

Mito's classmate whom everybody calls Alice instead of her real name, Arishe. Despite her doll-like appearance, Arishe is a tsundere, very aggressive and violent. On the flip side, Arishe suffers from inferiority complex, due to being bullied and treated badly when she was younger. Due to these experiences, Arishe lost her confidence in everything.

Hashihime Maasa橋姫 真麻AB
MeasurementsHeight: 166cm, Weight: 51kg, Bust-Waist-Hips: 87-62-88cm
HairBlack, Blue, Blunt Bangs, Hime Cut, Multicolored, Parted to Side, Ponytail, Sidehair, Straight, Waist Length+
EyesBlue, Tareme
BodyAverage Height, Pale, Slim, Teen
ClothesBlouse, Clothing with Ribbons, Hairpin, Knee-high Socks, Miniskirt, Ribbon Hair Tie, Ribbon Tie, Sailor School Uniform, School Uniform, Sports Swimsuit, Unusual Hair Ornaments
PersonalityEmotional, Kind, Proactive, Watashi
RoleHigh School Student, School Sports Club President, School Swimming Club Member, Senpai
Engages inCompetition, Planning, Reading, Swimming
Voiced byKawashima Rino


Aptitude Style: Defender
Hobbies: Running
Likes: People who give it their all
Dislikes: Sloppy people, when things get out of hand

A third-year student who is the leader of the sensui team.

Housei Mito蓬生 みとO
MeasurementsHeight: 151cm, Weight: 45kg, Bust-Waist-Hips: 80-57-80cm
HairAhoge, Blond, Multicolored, Red, Short, Spiky, Spiky Bangs
EyesRed, Tareme
BodyAverage Height, Pale, Slim, Teen
ClothesHairpin, Hoodie, Knee-high Socks, Ribbon Tie, Sailor School Uniform, School Uniform, Sports Swimsuit, T-shirt
PersonalityAltruistic, Clumsy, Deredere, Energetic, Friendly, Hardworker, Stubborn, Sweets Lover
RoleBad Student, High School Student, Kouhai, School Swimming Club Member
Engages inAthletics, Competition, Shopping, Swimming, Teasing
Subject ofFlirting, Teasing
Voiced byMoka Choko


Aptitude Style: All Mighty
Hobbies: Collecting Ukifune Riku goods
Likes: Ukifune Riku's swimsuit!
Dislikes: Scary people (Becomes weak in the presence of an angry person)

A freshman at Aosaki Academy, a kind-hearted and hardworking girl. She greatly admires Ukifune Riku, because of her, Mito started doing sensui (however, she doesn't realize that Ukifune Riku is actually her coach, Hasemi Riku). Bad at studying and due to not realizing that she's actually pretty good in sensui, is a fact that keeps her from growing as a sensui player.

Umegae Rikoko梅枝 莉子々B
MeasurementsHeight: 160cm, Weight: 48kg, Bust-Waist-Hips: 89-60-85cm
HairBlue, Curtained, Parted in Middle, Ponytail, Spiky Bangs, Straight
BodyAverage Height, Pale, Slim, Teen
ClothesGloves, Jacket, Jeans, Ribbon Hair Tie, Ribbon Tie, Sailor School Uniform, School Uniform, Sports Swimsuit, Tank Top, Thigh-high Stockings, Turtleneck Sweater, Vest
PersonalityKind, Mischievous
RoleClassmate, Full Sister, High School Student, Older Sister, Part-time Worker, School Swimming Club Member, Senpai
Engages inCompetition, Planning, Sports, Swimming
Voiced byMizukiri Keito


Aptitude Style: Tricker, Commander
Hobbies: Messing around with MAVs
Likes: Family
Dislikes: SUSUKI-brand MAVs (They're incompatible with her fashion sense)

A sophomore at Aosaki Gakuen and Riku's classmate.

Side characters

HairBeard, Grey, Short
BodyOld, Pale


The new principal of Aosaki Academy who joined the office just one year ago.

Eawase Satsuki絵合 皐A
MeasurementsHeight: 163cm, Weight: 49kg, Bust-Waist-Hips: 85-62-86cm
HairIntake, Pink, Ponytail, Sidehair, V Bangs, Waist Length+, Wavy
BodyAverage Height, Pale, Slim, Teen
ClothesBracelet, One Piece Swimsuit, School Uniform, String Ribbon Tie, Thigh-high Stockings
PersonalityArrogant, Smart
RoleHigh School Student, Kouhai, Rival, School Swimming Club Member
Engages inCompetition, Swimming
Subject ofTeasing
Voiced byAkashi Yuki


Aptitude Style: Queen
Hobbies: Shopping
Likes: BWW-brand MAVs
Dislikes: Ukifune Riku

West Japan's best Sensui player who is also Ukifune Riku's former teammate.

Hananoe Sakura花宴 桜B
MeasurementsHeight: 167cm, Weight: 55kg, Bust-Waist-Hips: 91-64-89cm
HairStraight, V Bangs, Violet, Waist Length+
BodyAverage Height, Big Breast Sizes, Pale, Slim, Teen
ClothesBoots, Bracelet, One Piece Swimsuit, Thigh-high Stockings
PersonalityStrict, Tomboy
RoleChildhood Friend, Coach
Engages inCompetition, Swimming
Voiced bySugihara Matsuri


Aptitude Style: Attacker
Hobbies: Training
Likes: Powerplay in sports (like pushing her opponents off their balance)
Dislikes: Psychological tricks

Hasemi Yui長谷見 優衣
HairBrown, Waist Length+, Wavy
BodyPale, Slim, Young-adult
ClothesBelt, High Heels, Pantyhose, Pendant Necklace, Skirt Suit
PersonalityPretending, Sloppy, Smart
RoleCousin, Teacher
Voiced byHaruna Ren


Riku's cousin and a mathematics teacher at Aosaki Academy who lives with him. In the public eye, she is a teacher with both beautiful personality and appearance. However, when she steps home, she turns to the laziest person ever, not even bothering to do any household chores. Despite this, she is pretty smart and often encourages Riku.

Miotsukushi Tarou澪標 太郎
HairAhoge, Blond, Brown, Short, Spiky
BodyMuscular, Olive, Teen
ClothesSwimming Spats
PersonalityNature Lover
RoleClassmate, Friend, High School Student, School Swimming Club Member
Engages inSwimming
Voiced byKurusugawa Isamu


A second-year student at Aosaki Academy who is Riku's classmate and best friend. A member of the academy's swimming club, Tarou is such a good swimmer he has entered a couple national-level competitions.

Sekiya Hotaruko関屋 蛍子B
MeasurementsHeight: 147cm, Weight: 42kg, Bust-Waist-Hips: 76-??-??cm
HairAhoge, Shoulder-length, Spiky Bangs, Teal, Twin Tails
EyesBlue, Tareme
BodyAverage Height, Slim, Tanned, Teen
ClothesAnkle Socks, Bracelet, Hair Tie, One Piece Swimsuit, Ribbon Tie, Sailor School Uniform, School Uniform, Spats, Sports Shoes, Sports Swimsuit
PersonalityBoku, Energetic, Stubborn, Tomboy
RoleHigh School Student
Engages inCompetition, Swimming
Voiced byAkino Hana


Aptitude Style: All Mighty, Diver, Surfer
Hobbies: Swimming
Likes: Playing sensui with everybody
Dislikes: Lazy people