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Suisei Ginka


TitleSuisei Ginka
Original titleスイセイギンカ
AliasesAquatic Mercury
LengthMedium (10 - 30 hours)
DeveloperAkatsuki Works
PublishersAkatsuki Works & Applique
LinksWikipedia (ja), Wikidata, VNStat


Ten years ago, there was an accident during the transport of chemicals in the port city of Mizuho, as well as a series of murders, but it is now just a part of history. At that time, Izana suddenly became separated from her best friend Tetsuo, and she never could come to terms with his disappearance.

This summer Tetsuo suddenly reappeared before the overjoyed Izana. However, he revealed to her a terrible truth…

[From Hau~ Omochikaeri!]

Hide spoilersShow minor spoilersSpoil me! | Show sexual traits


Main characters

Hoshii Seika星井 青香
MeasurementsHeight: 163cm, Bust-Waist-Hips: 90-60-89cm, F cup
HairBlack, Side Tail
BodyBig Breast Sizes, Pale, Slim, Teen
ClothesBikini, Decorative Belt, Pendant Necklace, School Uniform
PersonalityArrogant, Smart, Stoic, Strict
RoleDaughter, High School Student, Ojousama, Younger Sister
Engages inSwimming
Voiced bySakurano Hiyo


Seika is Izana's best female friend and more than a little bit prickly toward anyone who approaches her with ulterior motives (and because of Izana's easy manner and physical beauty, that is pretty common. She was raised by a strict father who sees her only as a convenient object to augment his own ambitions for the family line, which is a lot of the reason why she is so prickly in general. Her sole point of softness is Izana, whom she would probably do anything for.

[Edited from Fuwanovel]

Jougasaki Momo城ヶ崎 桃
MeasurementsHeight: 160cm, Bust-Waist-Hips: 82-56-85cm, C cup
HairBun, Parted to Side, Pink, Shoulder-length, Spiky Bangs
ClothesBikini Skirt, Hairpin, Necklace, Swimsuit, Tank Top
PersonalityFriendly, Funny, Kind, Lazy
RoleDetective, Domestic Partner
Engages inDrinking, Smoking, Swimming
Voiced byKawashima Rino


"Oh... I'm out of tobacco, I can open beer now because I am not motivated!".

Momo is Tetsuo's guardian/oneesan/coworker. She is a heavy-drinker and a heavy-smoker and she is actually thirty, though she looks twenty. She is also a brilliant (genius-level) individual as well as being highly perceptive when it comes to people in general. She and Tetsuo have lived most of the last ten years around one another, and they know each other about as well as it is possible to know another person without being them.

[Edited from Fuwanovel]

MeasurementsHeight: 175cm
HairBrown, Parted to Side, Ponytail
PersonalityArrogant, Strange
RoleLegal Guardian, Management, Wealthy
Voiced byKawamura Masato


"We are not centre of justice, but we are also not even an evil organization planning to conquer the world!".

Maria's father and also the director of Tatsunagi Pharmaceutical -- a company that toppled over the transport truck of chemicals ten years ago.

Souma Izana相馬 いざな
MeasurementsHeight: 156cm, Bust-Waist-Hips: 86-58-88cm, D cup
HairBlond, Tiny Braid, Waist Length+
ClothesApron, Bikini, Hair Ribbon, Ribbon Hair Tie, School Uniform, Skirt, Swimsuit
RoleChildhood Friend, Daughter, Friend, High School Student, Honor Student
Engages inMartial Arts, Swimming
Voiced bySawasawa Sawa


Tetsuo's childhood friend. After their reunion, there were able to figure out what they were thinking about each other. She is an excellent student, and also helps out at her mother's coffee shop.

A positive thinker just like Tetsuo. She has a cheerful personality, but shows a slovenly side to the people close to her. Her speciality is kickboxing.

"Hey, did you fall in love at first sight with the grown-up figure of my childhood friend who has back for the first time in ten ye... Hey, what I said right now!".

Side characters

Hoshii Shizuku星井 雫
HairBlue, Long, Parted to Side, Wavy
BodyNail Polish, Pale, Slim
ClothesBelt, Bracelet, Choker, Collar, Crop Top, High Heels, Miniskirt, Pendant Necklace
RoleNot a Virgin
Voiced bySugihara Matsuri
Sawajiri Katsuki沢尻 勝紀
MeasurementsHeight: 168cm
BodyOlive, Slim, Teen
ClothesSchool Uniform
RoleFriend, High School Student, Student Council President
Engages inDrawing
Voiced byIi Kinniku


"I've never been a Tetsuo's friend.".

He is a student council president, but he also likes to draw and is a young man with a gentle smile.