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Summary

Gryce (グライス) lives in a world where monsters and humans hate each other and are always at war. Gryce runs away from the battlefield and discovers an old mansion owned by a female butterfly demon named Houkiboshi (箒星). Houkiboshi keeps her foster daughter, Merufia (a mermaid), confined inside the mansion because she thinks that the world outside the mansion is a dangerous place, but Merufia is determined to leave the mansion, wanting to learn more about the outside world. Since Gryce sympathizes with Merufia’s desire to leave the mansion, Houkiboshi begins to hate Gryce; at same time, Merufia begins to fall in love with Gryce and they soon begin a love affair. [Edited description by fhc]

Doutei no Ore ga Onna Joushi to Shucchou ni Ittara, Heya ga Onaji Datta Ken
Doutei no Ore ga Onna Joushi to Shucchou ni Ittara, Heya ga Onaji Datta Ken
NAN%
Tags
  • Protagonist's Boss as a Heroine
  • Office Lady Heroine
  • Consensual Chikan
  • Only Non-Virgin Heroines
  • Office
Rating 6.6330 Users
Kimomen Demo Kyokon nara School Caste no Chouten ni Tateru!? ~Gakuen Ichi no Motekawa Shuudan ni Tanetsuke Shimakuri! Yume no Gakuen Harem!~
Kimomen Demo Kyokon nara School Caste no Chouten ni Tateru!? ~Gakuen Ichi no Motekawa Shuudan ni Tanetsuke Shimakuri! Yume no Gakuen Harem!~
NAN%
Tags
  • Nipple Piercing
  • Unavoidable Heroine Rape by the Protagonist
  • Genital Piercing
  • Athlete Heroine
  • Unavoidable Harem Ending
Rating 6.6232 Users
Yan Moe Futago Shimai ~Yande Harande Ai Sarete...~
Yan Moe Futago Shimai ~Yande Harande Ai Sarete...~
NAN%
Tags
  • Heroine with Baby Complex
  • Shimaidon with Twins Ending
  • Shimaidon Ending
  • Twin Sisters as Heroines
  • Yandere Heroine
Rating 6.4640 Users
relations sister×sister.
relations sister×sister.
NAN%
Tags
  • Heroine Sisters
  • Waitress Heroine
  • Protagonist's Non-blood-related Sister as a Heroine
  • Slice of Life
  • Love Triangle
Rating 6.4733 Users
Succu Ari Apart
Succu Ari Apart
NAN%
Tags
  • Heroine with Gigantic Breasts
  • Voice Saving
  • Playtime Counter
  • Heroine with Inverted Nipples
  • Nursing Handjob
Rating 6.8333 Users
Usodere!
Usodere!
NAN%
Tags
  • Pretending Heroine
  • Orphan Protagonist
  • Wealthy Protagonist
  • Pragmatic Heroine
  • All-girls School
Rating 6.6848 Users
Princess X FD ~Iinazuke wa Owaranai!?~
Princess X FD ~Iinazuke wa Owaranai!?~
NAN%
Tags
  • Monster Girl Support Character
  • Monster Girl Heroine
  • Sex with Monster Girls
  • Alien Heroine
  • Modern Tsundere Heroine
Rating 6.1683 Users
Hyoui Kanojo ~Tsukikano
Hyoui Kanojo ~Tsukikano
NAN%
Tags
  • Long Common Route
  • Heroine with Eye Covering Hairstyle
  • Office Lady Heroine
  • Molestation on Public Transport
  • Ghost Heroine
Rating 6.8229 Users
Hitozuma no Ana ~Ano Ko wa Koko kara Umaretekita no yo~
Hitozuma no Ana ~Ano Ko wa Koko kara Umaretekita no yo~
NAN%
Tags
  • Nursery School
  • Netori
  • Married Heroine
  • Heroine with Pubic Hair
  • Teacher Protagonist
Rating 6.5334 Users
Gijinka Pet no Kozukuri Ongaeshi ~Kenage de Amaeta na Usamusume ni Shinu hodo Aisareru!~
Gijinka Pet no Kozukuri Ongaeshi ~Kenage de Amaeta na Usamusume ni Shinu hodo Aisareru!~
NAN%
Tags
  • Rabbitgirl Heroine
  • Albino Heroine
  • Reincarnation
  • White Haired Heroine
  • Pregnancy
Rating 6.5322 Users
Kouki na Ojou-sama o Katappashi kara Haramasetara, Dou Naru ka?
Kouki na Ojou-sama o Katappashi kara Haramasetara, Dou Naru ka?
NAN%
Tags
  • Impregnation Choice
  • Impregnation
  • Yamato Nadeshiko Heroine
  • Small Breast Sizes Heroine (Non-Loli)
  • Unlockable Harem Ending
Rating 6.8920 Users
Tsun M! ~Gyutto Shibatte Shidoushite~
Tsun M! ~Gyutto Shibatte Shidoushite~
NAN%
Tags
  • Heroine with Inverted Nipples
  • Bondage
  • Only a Single Heroine
  • Heroine with Big Breasts
  • High School Student Heroine
Rating 6.6920 Users
Yuuwaku Onna Kyoushi ~Ureta Mitsu no Aji~
Yuuwaku Onna Kyoushi ~Ureta Mitsu no Aji~
NAN%
Tags
  • Only Older Heroines
  • Heroine with Children
  • Student-Teacher Romance
  • Obacon
  • School Nurse Heroine
Rating 6.7720 Users
Mamono Musume-tachi to no Rakuen ~Kumo to Tori to Hitotsume to~
Mamono Musume-tachi to no Rakuen ~Kumo to Tori to Hitotsume to~
NAN%
Tags
  • Sex with Monster Girls
  • Monster Girl Heroine
  • Past Japan
  • Unlockable Harem Ending
  • Super Deformed CG's
Rating 7.1871 Users
Ore ni Kanojo ga Dekite kara Imouto-tachi no Yousu ga Okashii!?
Ore ni Kanojo ga Dekite kara Imouto-tachi no Yousu ga Okashii!?
NAN%
Tags
  • Reverse Netorare
  • Protagonist's Sister as a Heroine
  • Brother/Sister Incest
  • Only Protagonist's Sisters as Heroine(s)
  • Only Younger Heroines
Rating 6.9035 Users
Mamono Musume-tachi to no Rakuen ~Slime & Scylla~
Mamono Musume-tachi to no Rakuen ~Slime & Scylla~
NAN%
Tags
  • Sex with Monster Girls
  • Heroine with Tentacles
  • Slime Heroine
  • Pirate Protagonist
  • Monster Girl Heroine
Rating 6.9192 Users
Kiriya Hakushakuke no Roku Shimai
Kiriya Hakushakuke no Roku Shimai
NAN%
Tags
  • Traditionalist Family
  • 20's
  • Romancing a Family
  • Religious Heroine
  • More Than Seven Heroines
Rating 7.42126 Users
Mamono Musume to no Seikatsu ~Lamia no Baai~
Mamono Musume to no Seikatsu ~Lamia no Baai~
NAN%
Tags
  • Sex with Monster Girls
  • Hint Corner
  • No "Keep Voice on Click" Option
  • Childhood Promise
  • Fictional Beings
Rating 6.26343 Users
Erotica Yuuwaku Kenshuu Hajimaru yo~ Shigoichau Kara Kakugo Nasai!
Erotica Yuuwaku Kenshuu Hajimaru yo~ Shigoichau Kara Kakugo Nasai!
NAN%
Tags
  • Group (4+) Footjob
  • Group (4+) Boobjob
  • Foreskin Play
  • Submissive Protagonist
  • Twin Buttjob
Rating 7.2562 Users
Makapara! ~Ano Yo de Mecha Mote~
Makapara! ~Ano Yo de Mecha Mote~
NAN%
Tags
  • Non-human Heroine
  • Discipline Committee Leader Heroine
  • Orekko Heroine
  • Principal Heroine
  • Dragon Heroine
Rating 6.5931 Users
Mesu Ochi! Miwaku no Hitozuma Life ~Toshiuezuma-tachi to no Icha Love Shirudaku Seikatsu~
Mesu Ochi! Miwaku no Hitozuma Life ~Toshiuezuma-tachi to no Icha Love Shirudaku Seikatsu~
NAN%
Tags
  • Rounin Protagonist
  • In-law Incest
  • Protagonist's Sister-in-Law as a Heroine
  • Blood-related Aunt/Nephew Incest
  • Protagonist's Aunt as a Heroine
Rating 7.08114 Users
Kasshoku Anameito ~Momojirikko o Otose♪~
Kasshoku Anameito ~Momojirikko o Otose♪~
NAN%
Tags
  • Single Character Multiple Defloration
  • Heroine with Erotic Adhesive Bandage
  • Ass To Mouth
  • Gokkun
  • Mad Scientist Support Character
Rating 7.1365 Users
Honoo no Haramase Jinsei ~Ano Koro ni Modotte Haramase Night~
Honoo no Haramase Jinsei ~Ano Koro ni Modotte Haramase Night~
NAN%
Tags
  • Elementary School Student Protagonist
  • Elementary School
  • Elementary School Student Heroine
  • Spontaneous Sex Scenes
  • Time Travel
Rating 6.8449 Users
Ane wa Kanojo de Senzoku Maid
Ane wa Kanojo de Senzoku Maid
NAN%
Tags
  • Homemaker Protagonist
  • Stockings
  • Wedding
  • Condoms
  • Oneesan-type Heroine
Rating 6.3839 Users
Sei Monmusu Gakuen
Sei Monmusu Gakuen
32%
Tags
  • Monster Girl Support Character
  • Monster Girl Heroine
  • Boke Heroine
  • Living Doll Heroine
  • Dragon Heroine
Rating 7.55105 Users
Mamono Musume to no Seikatsu ~Alraune no Baai~
Mamono Musume to no Seikatsu ~Alraune no Baai~
28%
Tags
  • Plant Heroine
  • Sex with Monster Girls
  • No "Keep Voice on Click" Option
  • Healer Protagonist
  • Widow(er) Protagonist
Rating 6.6545 Users
Mamono Musume-tachi to no Rakuen ~Kumo to Tori to Hitotsume to~
Mamono Musume-tachi to no Rakuen ~Kumo to Tori to Hitotsume to~
26%
Tags
  • Sex with Monster Girls
  • Monster Girl Heroine
  • Past Japan
  • Unlockable Harem Ending
  • Super Deformed CG's
Rating 7.1871 Users
Yuuwaku Onna Kyoushi ~Ureta Mitsu no Aji~
Yuuwaku Onna Kyoushi ~Ureta Mitsu no Aji~
26%
Tags
  • Only Older Heroines
  • Heroine with Children
  • Student-Teacher Romance
  • Obacon
  • School Nurse Heroine
Rating 6.7720 Users
Tsun M! ~Gyutto Shibatte Shidoushite~
Tsun M! ~Gyutto Shibatte Shidoushite~
25%
Tags
  • Heroine with Inverted Nipples
  • Bondage
  • Only a Single Heroine
  • Heroine with Big Breasts
  • High School Student Heroine
Rating 6.6920 Users
Gijinka Pet no Kozukuri Ongaeshi ~Kenage de Amaeta na Usamusume ni Shinu hodo Aisareru!~
Gijinka Pet no Kozukuri Ongaeshi ~Kenage de Amaeta na Usamusume ni Shinu hodo Aisareru!~
24%
Tags
  • Rabbitgirl Heroine
  • Albino Heroine
  • Reincarnation
  • White Haired Heroine
  • Pregnancy
Rating 6.5322 Users
Kouki na Ojou-sama o Katappashi kara Haramasetara, Dou Naru ka?
Kouki na Ojou-sama o Katappashi kara Haramasetara, Dou Naru ka?
24%
Tags
  • Impregnation Choice
  • Impregnation
  • Yamato Nadeshiko Heroine
  • Small Breast Sizes Heroine (Non-Loli)
  • Unlockable Harem Ending
Rating 6.8920 Users
Hyoui Kanojo ~Tsukikano
Hyoui Kanojo ~Tsukikano
23%
Tags
  • Long Common Route
  • Heroine with Eye Covering Hairstyle
  • Office Lady Heroine
  • Molestation on Public Transport
  • Ghost Heroine
Rating 6.8229 Users
Hitozuma no Ana ~Ano Ko wa Koko kara Umaretekita no yo~
Hitozuma no Ana ~Ano Ko wa Koko kara Umaretekita no yo~
23%
Tags
  • Nursery School
  • Netori
  • Married Heroine
  • Heroine with Pubic Hair
  • Teacher Protagonist
Rating 6.5334 Users
Mamono Musume-tachi to no Rakuen ~Slime & Scylla~
Mamono Musume-tachi to no Rakuen ~Slime & Scylla~
21%
Tags
  • Sex with Monster Girls
  • Heroine with Tentacles
  • Slime Heroine
  • Pirate Protagonist
  • Monster Girl Heroine
Rating 6.9192 Users
Mamono Musume to no Seikatsu ~Lamia no Baai~
Mamono Musume to no Seikatsu ~Lamia no Baai~
21%
Tags
  • Sex with Monster Girls
  • Hint Corner
  • No "Keep Voice on Click" Option
  • Childhood Promise
  • Fictional Beings
Rating 6.26343 Users
Makapara! ~Ano Yo de Mecha Mote~
Makapara! ~Ano Yo de Mecha Mote~
20%
Tags
  • Non-human Heroine
  • Discipline Committee Leader Heroine
  • Orekko Heroine
  • Principal Heroine
  • Dragon Heroine
Rating 6.5931 Users
Kasshoku Anameito ~Momojirikko o Otose♪~
Kasshoku Anameito ~Momojirikko o Otose♪~
20%
Tags
  • Single Character Multiple Defloration
  • Heroine with Erotic Adhesive Bandage
  • Ass To Mouth
  • Gokkun
  • Mad Scientist Support Character
Rating 7.1365 Users
Ane wa Kanojo de Senzoku Maid
Ane wa Kanojo de Senzoku Maid
19%
Tags
  • Homemaker Protagonist
  • Stockings
  • Wedding
  • Condoms
  • Oneesan-type Heroine
Rating 6.3839 Users
Shoujo Activity
Shoujo Activity
19%
Tags
  • Half-Japanese Heroine
  • Threesome Ending
  • Protagonist's Childhood Friend as a Heroine
  • Early Sexual Content
  • Defloration During Common Route
Rating 6.7639 Users
ShiroKuro Iede Gyaru - Tomete Kuretara Nandemo Suru yo ♥
ShiroKuro Iede Gyaru - Tomete Kuretara Nandemo Suru yo ♥
19%
Tags
  • Sugar Dating
  • Runaway Heroine
  • Gyaru Heroine
  • Flat Tints Only
  • Used Condoms Exposition
Rating 6.5146 Users
Kouhai no Oku-san ni Mukashi no Yoshimi de Amaete, Mi mo Kokoro mo Netoru Hanashi
Kouhai no Oku-san ni Mukashi no Yoshimi de Amaete, Mi mo Kokoro mo Netoru Hanashi
19%
Tags
  • Salaryman Protagonist
  • Drunk Sex
  • Highly Animated Sprites
  • Lip Sync
  • Love Hotel
Rating 6.4043 Users
Uwaki Tsuma ~Kyonyuu Hitozuma Midare Manshon~
Uwaki Tsuma ~Kyonyuu Hitozuma Midare Manshon~
19%
Tags
  • Shimaidon
  • Non-twin Heroine Sisters
  • Homemaker Protagonist
  • Protagonist in Relationship
  • Married Heroine
Rating 6.4824 Users
Netori Gakuen ~Kareshi Mochi Demo Okamainashi! Yaritai Houdai ADV~
Netori Gakuen ~Kareshi Mochi Demo Okamainashi! Yaritai Houdai ADV~
19%
Tags
  • Heroine in Relationship with Other(s)
  • Protagonist with Phimosis
  • Arrogant Heroine
  • Student Council Member Heroine
  • Netori
Rating 6.3647 Users
Naze ka Kanojo ga Boku ni Ecchi o Sematte Kuru Ken
Naze ka Kanojo ga Boku ni Ecchi o Sematte Kuru Ken
19%
Tags
  • Timid Protagonist
  • Submissive Protagonist
  • Non-penetrative Sex
  • Gamer Protagonist
  • Gamer Heroine
Rating 7.0628 Users
Monmusu! Gyaku Rape Gakuen
Monmusu! Gyaku Rape Gakuen
18%
Tags
  • Sex with Monster Girls
  • Monster Girl Heroine
  • Plant Heroine
  • Suction on Penis
  • Tailjob
Rating 6.5841 Users
Saiminjutsu o Tameshitara Onaji Mansion no Bakunyuu Hitozuma ga Ore no Mono ni Natta
Saiminjutsu o Tameshitara Onaji Mansion no Bakunyuu Hitozuma ga Ore no Mono ni Natta
18%
Tags
  • Impregnation
  • Discreet Phone Sex
  • Footjob
  • Unlockable Harem Ending
  • Erotic Mind Control
Rating 5.8826 Users
Relaxation Yuka ~Karada mo Kokoro mo Iyasarete~
Relaxation Yuka ~Karada mo Kokoro mo Iyasarete~
18%
Tags
  • Erotic Massage
  • Manual Prostate Stimulation
  • Brief Branches Only
  • Salaryman Protagonist
  • Prostitute Heroine
Rating 6.7265 Users
Yoyogi Hitozuma Senmon Gakuin ~Nyuuzuma-tachi no Ennui~
Yoyogi Hitozuma Senmon Gakuin ~Nyuuzuma-tachi no Ennui~
18%
Tags
  • Announcer Heroine
  • Protagonist's Sister-in-Law as a Heroine
  • Nurse Heroine
  • Family Life Comedy
  • American Heroine
Rating 7.0825 Users

Mamono Musume no Yakata Suiseikan Igyouroku ~Ningyo no Shou~ has not appeared in our Steam sample enough to calculate it's similar novels... sorry!
A novel needs atleast 20 owners before it's similarity is calculated.

Tags (32 total)

NameScoreImportanceWeight
Monster Girl Support Character3.002.667.98
Mermaid Heroine3.002.597.77
Monster Girl Heroine3.002.156.44
Butterflies2.003.086.15
Fairy Support Character2.002.905.80
Central Heroine3.001.815.44
Heroine with Wings2.002.214.41
Heroine with Tattoo2.002.154.31
Villainous Heroine2.002.074.14
Madness2.001.913.82
Western-style Manor2.001.813.61
Death of Heroine2.001.743.48
Deepthroat2.001.523.04
Dark Skinned Heroine2.001.503.00
Magic2.001.462.91
Female Domination2.001.442.88
Sex in Water2.001.412.82
One True End2.001.392.77
Intercrural Sex2.001.342.69
Few Choices2.001.342.67
Bad Ending(s)2.001.202.39
Sixty-nine2.001.072.14
High Sexual Content2.001.052.10
Armpit Sex1.002.002.00
Consensual Sex Involving Tentacles1.001.931.93
Cunnilingus2.000.931.86
Internal Exhibition of Sex1.001.561.56
Defloration2.000.761.52
Male Protagonist3.000.300.91
Cowgirl1.000.840.84
ADV3.000.150.44
2.000.000.00

Traits (50 total)

NameCharactersImportanceWeight
Harp Items13.732.59
Bedlah Clothes13.022.10
Fish Fins Body13.022.09
Ram Horns Body12.912.02
Insect Wings Body12.892.00
Merperson Role12.892.00
Forehead Necklace Clothes12.611.81
Symbol Eyes12.591.79
Fairy Role12.561.77
Armpit Sex Engages in (Sexual)12.481.72
Non-blood-related Daughter Role12.361.63
Unnatural Sclera Eyes12.351.63
Monster Girl Role12.301.59
Teal Hair12.161.50
Tail Body12.151.49
Veil Clothes12.141.49
Ankle Length Hair12.121.47
Unnatural Skin Tone Body12.081.44
Curious Personality11.921.33
Intercrural Sex Engages in (Sexual)11.851.28
Handjob Engages in (Sexual)21.161.27
Evening Gloves Clothes11.811.25
Tattoo Body11.801.25
Deepthroat Engages in (Sexual)11.801.25
Kemonomimi Body11.771.22
Confinement Subject of11.761.22
Reverse Missionary Subject of (Sexual)11.731.20
Panties Clothes11.731.20
Pointed Ears Body11.641.14
Garter Belt Stockings Clothes11.621.12
Sex in Water Engages in (Sexual)11.561.08
Bracelet Clothes11.561.08
Cowgirl Subject of (Sexual)20.951.05
Choker Clothes11.501.04
Wavy Hair11.360.94
White Hair11.330.92
Blowjob Engages in (Sexual)20.760.84
Standing Sex Subject of (Sexual)11.180.82
Cunnilingus Subject of (Sexual)11.160.81
Outdoor Sex Engages in (Sexual)11.160.80
Missionary Subject of (Sexual)11.120.77
Boobjob Engages in (Sexual)11.070.74
Violet Eyes11.040.72
Green Eyes11.020.70
Spiky Bangs Hair11.000.69
Straight Hair10.950.66
Doggy Style Subject of (Sexual)10.930.64
Long Hair10.750.52
Slim Body10.580.40
Pale Body10.370.26