Summary

A small port town called Fuugan, surrounded by deep mountains in the Tohoku region. It was a quiet rural area with no major industries or tourist attractions to speak of. The only notable building was the prison at the foot of the mountain. In this backwater town, illegal human experiments were being planned, away from prying eyes. However, trouble struck just before the experiments were set to begin, and Fuugan was devastated overnight. And then, prisoner Okamatsu Daigo woke up as usual. [Translated from the official site]

Ryoujoku Gakuenchou / Dorei Club ~Dokushin Choukyouroku~
Ryoujoku Gakuenchou / Dorei Club ~Dokushin Choukyouroku~
NAN%
Tags
  • Human Cattle
  • Sexual Slavery
  • Heroine with Armpit Hair
  • Heroine with Latex
  • Mouth Gag
Rating 7.1136 Users
Hitozuma Onna Kyoushi Seiyoku no Kyoushitsu
Hitozuma Onna Kyoushi Seiyoku no Kyoushitsu
NAN%
Tags
  • Principal Heroine
  • Only Adult Heroines
  • Dirty Talk
  • Cosplay
  • Widow Heroine
Rating 6.1525 Users
Yokorenbo ~Immoral Mother~
Yokorenbo ~Immoral Mother~
NAN%
Tags
  • Non-blood-related Mother/Daughter Incest
  • Fathercon Heroine
  • Sex with Sleepers
  • Protagonist's Blood-related Mother as a Heroine
  • Protagonist's Non-blood-related Sister as a Heroine
Rating 7.2386 Users
Tsuma Netori ~Onnakyoushi no Choukyou Nisshi~
Tsuma Netori ~Onnakyoushi no Choukyou Nisshi~
NAN%
Tags
  • Heroine with Crotchless Clothing
  • P.E. Teacher Heroine
  • Netori
  • Spreader Bar
  • Narrating Others' Thoughts
Rating 6.89103 Users
Relaxation Yuka You ~Hitozuma Therapist-tachi ni Yoru Iyashi no Jikan~
Relaxation Yuka You ~Hitozuma Therapist-tachi ni Yoru Iyashi no Jikan~
NAN%
Tags
  • Erotic Massage
  • Non-penetrative Sex
  • Soapy Massage
  • Manual Prostate Stimulation
  • Salaryman Protagonist
Rating 7.0345 Users
Gibo no Shizuku ~Shimetta Hada kara Kaori Tatsu Amai Iroka~
Gibo no Shizuku ~Shimetta Hada kara Kaori Tatsu Amai Iroka~
NAN%
Tags
  • Obacon
  • Foreskin Play
  • Librarian Heroine
  • Protagonist's Non-blood-related Mother as a Heroine
  • Only Older Heroines
Rating 7.3781 Users
Hitozuma Un
Hitozuma Un'yu Saimin NTR Ben
NAN%
Tags
  • Erotic Mind Control
  • Reverse Piledriver
  • Netori
  • Big Ass Heroine
  • Sex in a Vehicle
Rating 5.7020 Users
Mama to Boku no Karada no Shikumi Okaa-san ni Chitsunai Shasei Shitara Oyakoukou na Sekai
Mama to Boku no Karada no Shikumi Okaa-san ni Chitsunai Shasei Shitara Oyakoukou na Sekai
NAN%
Tags
  • Elementary School
  • Elementary School Student Protagonist
  • Shotacon Heroine
  • Sex Involving Smegma
  • Child Protagonist
Rating 7.0797 Users
Koukai ~Makan no Kokuin~
Koukai ~Makan no Kokuin~
NAN%
Tags
  • Religious Heroine
  • Non-twin Heroine Sisters
  • Sexual Slavery (Choukyou Variation)
  • Student Council President Heroine
  • Nun Heroine
Rating 7.1221 Users
Saimin Ryoujoku Gakuen
Saimin Ryoujoku Gakuen
NAN%
Tags
  • Student Club
  • Triple Handjob
  • Erotic Mind Control
  • Protagonist with Glasses
  • Perverted Protagonist
Rating 7.1050 Users
Bigaku Yurika & Asuna
Bigaku Yurika & Asuna
NAN%
Tags
  • Protagonist Selection
  • Strong Female Protagonist
  • Unavoidable Rape
  • Bullying
  • Villainous Protagonist
Rating 6.9820 Users
Gibo no Toiki ~Haitokushin ni Tadayou Haha no Iroka~
Gibo no Toiki ~Haitokushin ni Tadayou Haha no Iroka~
NAN%
Tags
  • Shopkeeper Heroine
  • Heroine with Anal Hair
  • In-law Incest
  • Heroine with Armpit Hair
  • Stockings
Rating 7.5750 Users
Hitozuma Gui ~Manbiki G-man Chijoku Nikki~
Hitozuma Gui ~Manbiki G-man Chijoku Nikki~
NAN%
Tags
  • Married Heroine
  • Heroine with Inverted Nipples
  • No "Keep Voice on Click" Option
  • Unlockable Harem Ending
  • Rape with Blackmail
Rating 6.9448 Users
Gated Community
Gated Community
NAN%
Tags
  • No "Keep Voice on Click" Option
  • Bondage Weights
  • Heroine with Anal Hair
  • Swinging
  • Flat Tints Only
Rating 7.2138 Users
Midara na Mansion
Midara na Mansion
NAN%
Tags
  • Janitor Protagonist
  • Promiscuous Heroine
  • Apartment Building
  • Married Heroine
  • Adult Heroine
Rating 6.7122 Users
Hindo no Yakata
Hindo no Yakata
NAN%
Tags
  • Pigs
  • Consensual Erotic Humiliation
  • Anal Rape
  • Dogs
  • Enema
Rating 7.5627 Users
Misako 37-sai ~Doutei Daigakusei × Futsuu no Shufu~
Misako 37-sai ~Doutei Daigakusei × Futsuu no Shufu~
NAN%
Tags
  • Landlady Heroine
  • Sexual Hair Eating
  • Netori
  • Consensual Erotic Humiliation
  • Heroine with Children
Rating 6.9499 Users
Ijikuri Mama 3
Ijikuri Mama 3
NAN%
Tags
  • Unavoidable Harem Ending
  • Heroine with Tan Lines
  • Shotacon
  • Inbreeding
  • Protagonist's Blood-related Mother as a Heroine
Rating 5.6725 Users
Relaxation Yuka Sou ~Hitozuma Therapist-tachi no Zeitaku W Course~
Relaxation Yuka Sou ~Hitozuma Therapist-tachi no Zeitaku W Course~
NAN%
Tags
  • Non-penetrative Sex
  • Salaryman Protagonist
  • Prostitute Heroine
  • Soapy Massage
  • Heroine with Beauty Mark
Rating 7.0141 Users
Ore ga Aishita Hitozuma ~Emiko~
Ore ga Aishita Hitozuma ~Emiko~
NAN%
Tags
  • Completely Avoidable Rape
  • Heroine with Huge Breasts
  • Pregnancy Ending
  • Soapy Massage
  • Love Hotel
Rating 6.5134 Users
Iyashinbo ~Sekai de Ichiban Suki na Hito~
Iyashinbo ~Sekai de Ichiban Suki na Hito~
NAN%
Tags
  • Mother/Son Romance
  • Blood-related Aunt/Nephew Incest
  • Protagonist's Aunt as a Heroine
  • Protagonist's Blood-related Mother as a Heroine
  • Blood-related Mother/Son Incest
Rating 7.7690 Users
Kaa-san no Otoko 2 ~Saiai no Haha ni Muragaru Osu~
Kaa-san no Otoko 2 ~Saiai no Haha ni Muragaru Osu~
NAN%
Tags
  • Only Bad Endings
  • Mindbreak
  • Netorare
  • Married Heroine
  • Only Blood-related Heroines
Rating 6.5248 Users
Dekachin Kozou
Dekachin Kozou
NAN%
Tags
  • Obacon
  • Mischievous Protagonist
  • Rape by Shota
  • Shota Protagonist
  • Straight Shotacon
Rating 6.95144 Users
Demiparadoxia ∞ Hookerstic - Hokujou Hen
Demiparadoxia ∞ Hookerstic - Hokujou Hen
NAN%
Tags
  • Prostitute Heroine
  • Heroine with Anal Hair
  • Heroine with Armpit Hair
  • Pubic Hair Option
  • Hotel
Rating 6.4523 Users
Beppin Mama Omnibus
Beppin Mama Omnibus
42%
Tags
  • Obacon
  • Otaku Friend
  • Heroine with Armpit Hair
  • Blood-related Mother/Son Incest
  • Shotacon
Rating 6.6429 Users
Okaa-san no Ama Ama Time ~Musuko no Yokubou~
Okaa-san no Ama Ama Time ~Musuko no Yokubou~
34%
Tags
  • Protagonist's Blood-related Mother as a Heroine
  • Blood-related Mother/Son Incest
  • Interactive Touching Game
  • Chubby Heroine
  • No Character Sprites
Rating 6.0622 Users
Gated Community
Gated Community
31%
Tags
  • No "Keep Voice on Click" Option
  • Bondage Weights
  • Heroine with Anal Hair
  • Swinging
  • Flat Tints Only
Rating 7.2138 Users
Hitozuma Gui ~Manbiki G-man Chijoku Nikki~
Hitozuma Gui ~Manbiki G-man Chijoku Nikki~
30%
Tags
  • Married Heroine
  • Heroine with Inverted Nipples
  • No "Keep Voice on Click" Option
  • Unlockable Harem Ending
  • Rape with Blackmail
Rating 6.9448 Users
Gibo no Toiki ~Haitokushin ni Tadayou Haha no Iroka~
Gibo no Toiki ~Haitokushin ni Tadayou Haha no Iroka~
29%
Tags
  • Shopkeeper Heroine
  • Heroine with Anal Hair
  • In-law Incest
  • Heroine with Armpit Hair
  • Stockings
Rating 7.5750 Users
Saimin Ryoujoku Gakuen
Saimin Ryoujoku Gakuen
27%
Tags
  • Student Club
  • Triple Handjob
  • Erotic Mind Control
  • Protagonist with Glasses
  • Perverted Protagonist
Rating 7.1050 Users
Bigaku Yurika & Asuna
Bigaku Yurika & Asuna
26%
Tags
  • Protagonist Selection
  • Strong Female Protagonist
  • Unavoidable Rape
  • Bullying
  • Villainous Protagonist
Rating 6.9820 Users
Mama to Boku no Karada no Shikumi Okaa-san ni Chitsunai Shasei Shitara Oyakoukou na Sekai
Mama to Boku no Karada no Shikumi Okaa-san ni Chitsunai Shasei Shitara Oyakoukou na Sekai
26%
Tags
  • Elementary School
  • Elementary School Student Protagonist
  • Shotacon Heroine
  • Sex Involving Smegma
  • Child Protagonist
Rating 7.0797 Users
Koukai ~Makan no Kokuin~
Koukai ~Makan no Kokuin~
26%
Tags
  • Religious Heroine
  • Non-twin Heroine Sisters
  • Sexual Slavery (Choukyou Variation)
  • Student Council President Heroine
  • Nun Heroine
Rating 7.1221 Users
Hindo no Yakata
Hindo no Yakata
26%
Tags
  • Pigs
  • Consensual Erotic Humiliation
  • Anal Rape
  • Dogs
  • Enema
Rating 7.5627 Users
Ijikuri Mama 3
Ijikuri Mama 3
26%
Tags
  • Unavoidable Harem Ending
  • Heroine with Tan Lines
  • Shotacon
  • Inbreeding
  • Protagonist's Blood-related Mother as a Heroine
Rating 5.6725 Users
Ore ga Aishita Hitozuma ~Emiko~
Ore ga Aishita Hitozuma ~Emiko~
26%
Tags
  • Completely Avoidable Rape
  • Heroine with Huge Breasts
  • Pregnancy Ending
  • Soapy Massage
  • Love Hotel
Rating 6.5134 Users
Kaa-san no Otoko 2 ~Saiai no Haha ni Muragaru Osu~
Kaa-san no Otoko 2 ~Saiai no Haha ni Muragaru Osu~
26%
Tags
  • Only Bad Endings
  • Mindbreak
  • Netorare
  • Married Heroine
  • Only Blood-related Heroines
Rating 6.5248 Users
Demiparadoxia ∞ Hookerstic - Hokujou Hen
Demiparadoxia ∞ Hookerstic - Hokujou Hen
26%
Tags
  • Prostitute Heroine
  • Heroine with Anal Hair
  • Heroine with Armpit Hair
  • Pubic Hair Option
  • Hotel
Rating 6.4523 Users
Moraliste ~Seikatsu Shidou Fusae no Houkago~
Moraliste ~Seikatsu Shidou Fusae no Houkago~
25%
Tags
  • Big Breast Sizes Protagonist
  • Teacher Protagonist
  • Serious Protagonist
  • Ponytail Protagonist
  • Protagonist with Glasses
Rating 6.5140 Users
Hitozuma Onna Kyoushi Seiyoku no Kyoushitsu 2
Hitozuma Onna Kyoushi Seiyoku no Kyoushitsu 2
24%
Tags
  • Heroine with Children
  • Heroine with Pubic Hair
  • Oyakodon Ending
  • Big Ass Heroine
  • Sexual Cosplay
Rating 6.1022 Users
Futari no Aniyome ~Miryokuteki na Aniyome-tachi to Doukyo Suru Koto ni Natta Hibi no Tenmatsu~
Futari no Aniyome ~Miryokuteki na Aniyome-tachi to Doukyo Suru Koto ni Natta Hibi no Tenmatsu~
24%
Tags
  • Protagonist's Sister-in-Law as a Heroine
  • Domicile
  • Pregnancy Ending
  • Netori
  • Big Breast Sizes Heroine
Rating 6.7831 Users
Seikoujo
Seikoujo
24%
Tags
  • Nun Heroine
  • Anal Gaping
  • Church Sex
  • Heroine with Anal Hair
  • Church
Rating 7.6224 Users
Gitai Saimin
Gitai Saimin
24%
Tags
  • School Sports Club
  • Extraterrestrial
  • School Sports Club Member Heroine
  • Class President Heroine
  • Invisibility
Rating 7.3646 Users
Musuko no Tame nara Midara ni Nareru Haha
Musuko no Tame nara Midara ni Nareru Haha
23%
Tags
  • Middle School Student Hero
  • Protagonist's Son as a Hero
  • Blood-related Mother/Son Incest
  • Protagonist with Big Breasts
  • Infidelity
Rating 6.9351 Users
Gakuen no Ikenie Nagusami Mono to Kashita Kyonyuu Furyou Shoujo ~Hakudaku ni Okasareru Kasshoku & Daniku no Kyouen~
Gakuen no Ikenie Nagusami Mono to Kashita Kyonyuu Furyou Shoujo ~Hakudaku ni Okasareru Kasshoku & Daniku no Kyouen~
23%
Tags
  • Delinquent Heroine
  • Muscular Heroine
  • Autosave Only
  • Dark Skinned Heroine
  • Heroine with Inverted Nipples
Rating 6.6534 Users
Musuko no Tomodachi ni Okasarete
Musuko no Tomodachi ni Okasarete
23%
Tags
  • Protagonist's Son as a Hero
  • Protagonist with Children
  • Perverted Hero
  • Lots of Event CGs
  • Unlockable Protagonist
Rating 7.5486 Users
Gyakushuu 4
Gyakushuu 4
23%
Tags
  • Protagonist with Tentacles
  • Knight Heroine
  • Cum Bath
  • Officer Protagonist
  • Horse
Rating 7.7128 Users
Beppin Mama ~Love Love Boshi Yuugi~
Beppin Mama ~Love Love Boshi Yuugi~
22%
Tags
  • Blood-related Aunt/Nephew Incest
  • Only Older Heroines
  • Protagonist's Aunt as a Heroine
  • Straight Shotacon
  • Heroine with Anal Hair
Rating 6.3745 Users

Epidemic ~Kansen Kakudai~ 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 (74 total)

NameScoreImportanceWeight
P.E. Teacher Heroine2.002.775.54
Scat3.001.705.09
Rimming Handjob2.002.444.89
Sadist Protagonist2.002.424.84
Triple Boobjob2.002.404.80
High Amounts of Rape3.001.554.65
Scientist Heroine2.002.314.63
Illness2.002.254.49
Narrating Others' Thoughts2.002.154.31
Built-in Flowchart2.002.074.14
Arrogant Heroine2.001.983.96
Only Bad Endings2.001.933.85
Long Sexual Scenes2.001.893.79
Mother Support Character2.001.773.54
Rapist Protagonist2.001.753.50
Early Branching Plot2.001.753.49
Object Insertion2.001.703.40
Confinement2.001.683.36
Enema2.001.683.36
Third-person Narrative2.001.673.34
Protagonist with Sexual Experience2.001.653.30
Petplay2.001.643.27
Music Recollection2.001.523.03
School2.001.513.02
Pissing2.001.442.89
Erotic Spanking2.001.442.88
Married Heroine2.001.432.85
Heroine with Huge Breasts2.001.402.81
Multiple Penetration2.001.292.57
Female Ejaculation2.001.282.56
Early Sexual Content2.001.232.46
Anal Sex2.001.132.26
Bondage2.001.122.23
Blood-related Mother/Daughter Incest1.002.212.21
Skip Scenes1.002.182.18
Wooden Horse1.002.182.18
Anal Gaping1.002.142.14
Group Sex of One Female and Several Males2.001.052.10
Triple Blowjob1.002.022.02
Adult Protagonist2.001.012.02
Student Heroine2.001.002.01
Balls Sucking1.001.971.97
Boobs on Glass1.001.911.91
Huge Insertion1.001.861.86
Group Sex of One Male and Several Females2.000.911.83
Masturbation in front of an Audience1.001.821.82
Mindbreak1.001.771.77
Body Writing1.001.751.75
BDSM1.001.661.66
Doggy Style2.000.811.62
Netori1.001.601.60
Piledriver1.001.591.59
Modern Day1.001.581.58
Defloration2.000.771.53
Heroine with Pubic Hair1.001.481.48
Anilingus1.001.481.48
Multiple Endings2.000.671.34
Nukige2.000.651.31
Protagonist with a Face2.000.631.26
Ahegao1.001.251.25
Pregnant Sex1.001.181.18
Lesbian Sex1.001.161.16
Heroine with Glasses1.001.111.11
Sitting Sex1.001.061.06
Naked Sprites1.001.061.06
Missionary Position1.000.950.95
Cunnilingus1.000.930.93
Cowgirl1.000.840.84
Rape Victim Heroine0.332.300.76
Male Protagonist2.000.300.61
Male on Male Rape0.252.300.58
Male on Male Sex0.251.650.41
ADV2.000.150.29
2.000.000.00

Traits (103 total)

NameCharactersImportanceWeight
Scat Engages in (Sexual)42.193.52
Triple Boobjob Engages in (Sexual)32.513.48
Enema Subject of (Sexual)32.022.80
Anilingus Engages in (Sexual)32.002.78
Dirty Anal Subject of (Sexual)13.732.59
Rape Subject of (Sexual)41.572.53
Scat on Others Engages in (Sexual)13.432.38
Anal Fingering Subject of (Sexual)31.712.37
Object Insertion Subject of (Sexual)22.162.37
Scat Subject of (Sexual)13.422.37
Suspension Bondage Subject of (Sexual)22.122.33
Rape by Deception Engages in (Sexual)13.332.31
Prostate Massage Subject of (Sexual)13.232.24
Pubic Hair Hair41.342.15
Piledriver Subject of (Sexual)21.942.13
Rape by Proxy Engages in (Sexual)12.962.05
Rape Engages in (Sexual)21.822.00
Rimming Handjob Engages in (Sexual)12.771.92
Sexual Slavery (Non-consensual) Subject of (Sexual)12.771.92
PE Teacher Role12.741.90
Rope Bondage Subject of (Sexual)21.681.84
Humping Engages in (Sexual)12.651.83
Double Penetration (Group Sex) Subject of (Sexual)21.661.82
Pubic Hair Shaving Subject of (Sexual)12.611.81
Strangulation Sex Subject of (Sexual)12.581.79
Blindfold Clothes12.551.77
Big Breast Sizes Body21.591.74
Bondage Sex Subject of (Sexual)21.591.74
Enchainment Subject of12.491.73
Criminal Role12.481.72
Anal Sex Subject of (Sexual)31.191.65
Anal Gaping Engages in (Sexual)12.361.64
Blouse Clothes21.461.60
Housewife Role12.311.60
Huge Insertion Subject of (Sexual)12.311.60
Tracksuit Clothes12.311.60
Scientist Role12.271.58
Balls Sucking Engages in (Sexual)12.251.56
Escape From Confinement Engages in12.251.56
Spats Clothes12.211.53
Double Penetration (Group Sex) Engages in (Sexual)12.191.52
Quickie Fix Subject of (Sexual)31.081.50
Whipping (BDSM) Subject of (Sexual)12.161.50
Boobs on Glass Subject of (Sexual)12.161.50
Tominagi Subject of (Sexual)21.361.49
Boobjob Engages in (Sexual)31.071.49
Mouth Gag Subject of (Sexual)12.141.48
Opposite Gender Voiced Personality12.111.46
Anilingus Subject of (Sexual)12.051.42
Tall (obsolete) Body12.031.41
Wedding Ring Clothes12.001.39
Secretive Personality12.001.39
Vaginal Gaping Engages in (Sexual)11.951.35
Masturbation in front of an Audience Engages in (Sexual)11.911.32
Spanking Subject of (Sexual)11.861.29
Standing Sex Subject of (Sexual)21.181.29
Sexual Blindfold Subject of (Sexual)11.861.29
Doggy Style Subject of (Sexual)30.931.28
Lab Coat Clothes11.801.24
Blowjob Engages in (Sexual)40.761.23
Handjob Subject of (Sexual)11.751.21
Missionary Engages in (Sexual)11.741.21
Vaginal Fingering Subject of (Sexual)21.081.19
Sitting Sex Subject of (Sexual)21.071.17
Green Eyes21.021.12
Vaginal Fingering Engages in (Sexual)11.611.12
Cunnilingus Engages in (Sexual)11.551.07
Blowjob Subject of (Sexual)11.521.05
Makeup Body11.511.05
Green Hair11.491.03
Pissing Engages in (Sexual)11.471.02
Headband Clothes11.451.01
Mother Role11.451.01
Daughter Role11.451.00
Brown Eyes20.900.99
Hair Tie Clothes11.400.97
Blunt Bangs Hair11.400.97
Nipple Sucking Subject of (Sexual)11.380.95
Skirt Clothes11.340.93
T-shirt Clothes11.310.91
Black Hair20.800.88
Ribbon Tie Clothes11.260.87
Short Hair30.610.84
School Uniform Clothes20.760.84
Violet Hair11.200.83
Long Hair20.750.82
Butterfly Subject of (Sexual)11.170.81
Cunnilingus Subject of (Sexual)11.160.81
Handjob Engages in (Sexual)11.150.80
Missionary Subject of (Sexual)11.120.78
Necktie Clothes11.120.77
Ponytail Hair11.100.76
Brown Hair20.690.75
Glasses Clothes11.080.75
Miniskirt Clothes11.060.74
Thigh-high Stockings Clothes11.050.73
Amber Eyes11.030.72
Sidehair Hair10.980.68
Cowgirl Subject of (Sexual)10.960.66
High School Student Role10.860.60
Virgin Sex Engages in (Sexual)10.850.59
Waist Length+ Hair10.820.57
Blue Eyes10.810.56