Satsukoi ~Yuukyuu Naru Koi no Uta~


Satsukoi ~Yuukyuu Naru Koi no Uta~
TitleSatsukoi ~Yuukyuu Naru Koi no Uta~
Original titleサツコイ~悠久なる恋の歌~
LengthMedium (10 - 30 hours)
DeveloperAlcot Honey Comb
Publishers Alcot Honey Comb
 Shalian Hanhua Weiyuanhui
Shares characters
Kanojo wa Tenshi de Imouto de


One snowy night, the protagonist, Kanou Izumi, kicked out of his house under some circumstances, lay dying in front of the train station. Unable to move from hunger, his five senses frozen from the cold, he was about to lose consciousness. His feelings were already past despair; he was void of all emotions.

Then, a girl, Shirahase Yuu, a classmate who often skips school, appears. As if picking up an abandoned kitten, she takes him to her apartment.

"Kanou-kun, you are my meal so I'm going to feed you to fatten you up." She smiles faintly as she voices those words.

"This girl is messed up."

Even while thinking that, Izumi had nowhere else to go, and so stays in her apartment. However, Izumi eventually realizes... Yuu is a descendant of the immortal man-eating mermaids.

Would you die for the sake of the one you love?

The predator and the prey.

A love story that no one will ever understand.


Kanou Izumi
Kanou Izumi加納 イズミ 
Hair, Brown, Long
Eyes, Brown
Body, Pale, Slim, Teen
Role, Full Brother, High School Student, Merperson, Non-blood-related Son, Older Brother, Twin Brother, Younger Brother
Engages in, Fighting, Self-sacrifice, Smoking
Subject of, Death, Fainting, Injury
Engages in (Sexual), Cowgirl, Doggy Style, Group Sex, Incest, Missionary, Outdoor Sex, Sex in Public Places, Virgin Sex
Subject of (Sexual), Blowjob, Boobjob, Handjob, Naizuri


The protagonist. He was is an orphan who's only memory of his past is that of his imouto. One day after getting stabbed in the shoulder by his foster father, he collapsed in front of the station before being saved by Yuu.

Main characters

Kawashima Nao
Kawashima Nao川嶋 直 
Hair, Blond, Long, Twin Tails
Eyes, Green
Body, Pale, Slim, Teen
Clothes, Hair Tie, School Uniform, Thigh-high Stockings
Personality, Airhead, Energetic, Kind
Role, Classmate, Daughter, High School Student, Not a Virgin
Engages in (Sexual), Boobjob, Handjob, Outdoor Sex, Sex in Public Places, Virgin Sex
Subject of (Sexual), Cowgirl, Missionary
Voiced byIchikawa Hinako


The protagonist's classmate. Cheerful girl, and very straightforward. Her family owns a inn, and business is somewhat in trouble. She likes to take care of others, especially the protagonist.

Shirahase Yuu
Shirahase Yuu白羽瀬 悠 
Hair, Ahoge, Brown, Shoulder-length
Eyes, Violet
Body, Pale, Slim, Teen
Clothes, Beret, Boots, Coat, Knee-high Socks, Scarf, School Uniform, Thigh-high Stockings
Personality, Energetic, Relaxed
Role, Full Sister, High School Student, Hikikomori, Merperson, Twin Sister, Younger Sister
Engages in, Singing
Subject of, Other Route Death
Engages in (Sexual), Blowjob, Group Sex, Handjob, Incest, Naizuri, Outdoor Sex, Sex in Public Places, Sixty-nine, Virgin Sex
Subject of (Sexual), Doggy Style, Missionary
Voiced byKusuhara Yui


The protagonist's classmate. A hikkikomori who lives alone in an apartment and never shows up to school. One day she sees the protagonist collapsed in front of the station, so she decided to save him.

Side characters

Aiba Tsukasa
Aiba Tsukasa相羽 司 
Hair, Black, Short
Eyes, Violet
Body, Pale, Slim, Teen
Clothes, School Uniform
Personality, Friendly, Pretending
Role, Classmate, High School Student, Non-human, Older Brother
Engages in, Kidnapping, Murder
Subject of, Death
Voiced byMizuki Sora


The protagonist's friend. <hidden by spoiler settings>He is actually a half human half ningyo zasshu. He hunts and kills people to feed his imouto.

Goutokuji Kiyomasa
Goutokuji Kiyomasa豪徳寺 清正 
Hair, Brown, Short
Eyes, Brown
Body, Pale, Slim, Teen
Clothes, Glasses, School Uniform
Role, Senpai, Student Club President
Voiced byMasuoka Yuuji


The newspaper club buchou. He aims to become a journalist.

Midou Izuna
Midou Izuna御堂 イズナ 
Hair, Curly, Sidehair, Violet, Waist Length+
Eyes, Garnet
Body, Adult, E+ Cup, Pale, Slim, Younger Appearance
Clothes, Decorative Belt, High Heels, Jacket, Trousers
Personality, Mysterious
Role, Merperson, Mother
Engages in, Cannibalism, Murder
Engages in (Sexual), Not Sexually Involved
Voiced byKitami Rikka


She is a pureblooded ningyo that has lived for hundreds of years. She has a nasty hobby of giving birth and eating her own children when they grow up.<hidden by spoiler settings>She is actually the mother of Yuu, Ruri and the protagonist.

Takashina Ikumi
Takashina Ikumi高階 郁美 
Hair, Green, Short
Eyes, Violet
Body, Pale, Slim, Teen
Clothes, Knee-high Socks, School Uniform
Personality, Carefree, Funny
Role, High School Student, Kouhai, School Newspaper Club Member, Wealthy
Voiced byHimekawa Airi


The protagonist's kouhai and fellow newspaper club member. She is a cheerful and funny girl. Her dad runs a detective agency.