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Summary

"Will you tutor meeee?" Little sister doesn't understand her homework and asked for help. It's a physical exam assignment from health and life sciences. She was learning about human sexual development.. we looked at the naked pictures in the book together... "I don't understand... that... will you look at mine? Can you show me?" Me and my imouto began her physical exam study. [From DLsite English]

Todoroke Seiki no Daihatsumei: Ai to Ikari to Kanashimi no Himitsu Kessha Dai Ni Kagakubu
Todoroke Seiki no Daihatsumei: Ai to Ikari to Kanashimi no Himitsu Kessha Dai Ni Kagakubu
NAN%
Tags
  • Inventor Protagonist
  • Comedy Rape
  • Secret Society
  • Unavoidable Heroine Rape
  • Secret Identity
Rating 5.99433 Users
Kagikko Shoujo ~Hizashi no Naka no Orusuban~
Kagikko Shoujo ~Hizashi no Naka no Orusuban~
NAN%
Tags
  • Genre Shift
  • Voiced Narration
  • Straight Lolicon
  • Linear Plot
  • Armpit Sex
Rating 6.5533 Users
Wanko to Lily
Wanko to Lily
NAN%
Tags
  • Doggirl Heroine
  • Reunion
  • Late Sexual Content
  • Family
  • Long Sexual Scenes
Rating 6.6128 Users
Yuzuminatsu
Yuzuminatsu
NAN%
Tags
  • Only Loli Heroines
  • Defloration During Common Route
  • Siscon Protagonist
  • Heroine with Shorts
  • Imouto-type Heroine
Rating 6.6048 Users
Love Sweets
Love Sweets
NAN%
Tags
  • Heroine Using Japanese Dialect
  • Co-worker Heroine
  • Baker Heroine
  • Waitress Heroine
  • Choices with 4 or More Options
Rating 6.66333 Users
Koi ni, Kanmi o Soete 2
Koi ni, Kanmi o Soete 2
NAN%
Tags
  • Detached Sexual Content
  • Shopkeeper Protagonist
  • Unlockable Sexual Content
  • Part-time Job
  • Athletics Festival
Rating 6.84207 Users
Dasshutsu wa Sex no Ato de -City Resort Hotel kara no Dasshutsu-
Dasshutsu wa Sex no Ato de -City Resort Hotel kara no Dasshutsu-
NAN%
Tags
  • Escape Game
  • Heroine with Pre-story Virginity Loss to the Protagonist
  • Interactive Adventure Game
  • Single Ending
  • Only Younger Heroines
Rating 6.0022 Users
Chinkamo Twins! ~Futago no Imouto-tachi ni Natsukareteru no wa Wakatteta kedo Masaka Ren
Chinkamo Twins! ~Futago no Imouto-tachi ni Natsukareteru no wa Wakatteta kedo Masaka Ren'ai Kanjou ni Kawaru Nante Omottenakatta Ken~
NAN%
Tags
  • Unnamed Protagonist
  • Blood-related Brother/Sister Incest
  • Only Protagonist's Sisters as Heroine(s)
  • Backlog Jump
  • Twin Sisters as Heroines
Rating 6.00124 Users
Kemonomichi ☆ Girlish Square 2
Kemonomichi ☆ Girlish Square 2
NAN%
Tags
  • Idol Heroine
  • Unavoidable Harem Ending
  • Cook Heroine
  • Unlockable Sexual Content
  • Mahou Shoujo Heroine
Rating 6.8048 Users
Nekogami-sama to, Nanatsuboshi -Imouto no Ane-
Nekogami-sama to, Nanatsuboshi -Imouto no Ane-
NAN%
Tags
  • Protagonist's Half-sister as a Heroine
  • Protagonist's Younger Sister as a Heroine
  • Brother/Sister Romance
  • Blood-related Brother/Sister Incest
  • Forbidden Love
Rating 6.73222 Users
Momoiro Renge ~Shimai to Tsumugu Ecchi na Kankei~
Momoiro Renge ~Shimai to Tsumugu Ecchi na Kankei~
NAN%
Tags
  • Only Protagonist's Sisters as Heroine(s)
  • Defloration During Common Route
  • Brother/Sister Incest
  • Orphan Heroine
  • Sex Under the Necessity
Rating 5.96109 Users
Mayuri no Himitsu
Mayuri no Himitsu
NAN%
Tags
  • Protagonist's Younger Sister as a Heroine
  • Brother/Sister Incest
  • Sex Involving Children
  • Straight Lolicon
  • Interactive Touching Game
Rating 5.4020 Users
Hajimete no Okaa-san
Hajimete no Okaa-san
NAN%
Tags
  • Father/Daughter Romance
  • Clothing ON/OFF
  • Lolicon Protagonist
  • Protagonist's Blood-related Daughter as a Heroine
  • Nude Filter
Rating 5.92153 Users
Naisho no Jikan
Naisho no Jikan
NAN%
Tags
  • Elementary School Student Heroine
  • Mesugaki Heroine
  • Student-Teacher Romance
  • Teacher Protagonist
  • Lolicon Protagonist
Rating 6.4895 Users
Tsumairo Shoujo ~Fuufu Seikatsu, Hajimemasu~
Tsumairo Shoujo ~Fuufu Seikatsu, Hajimemasu~
NAN%
Tags
  • Sudden Girlfriend Appearance
  • Apartment Building
  • Birthrate Decline
  • Yamato Nadeshiko Heroine
  • Arranged Marriage
Rating 5.62209 Users
Kemonomichi ☆ Girlish Square LOVE+PLUS
Kemonomichi ☆ Girlish Square LOVE+PLUS
NAN%
Tags
  • Japanese Idols
  • Mahou Shoujo Heroine
  • Idol Heroine
  • Modern Tsundere Heroine
  • Kuudere Heroine
Rating 6.5152 Users
sousyun
sousyun
NAN%
Tags
  • Blood-related Uncle/Niece Incest
  • Protagonist's Niece as a Heroine
  • Heroine with Pre-story Virginity Loss to the Protagonist
  • Sex Involving Children
  • Loli Heroine
Rating 6.1027 Users
Uchi no Imouto
Uchi no Imouto
NAN%
Tags
  • Protagonist's Sister as a Heroine
  • Protagonist's Blood-related Sister as a Heroine
  • Brother/Sister Romance
  • Protagonist's Full Sister as a Heroine
  • Incest Romance
Rating 6.79313 Users
DraPri Guu-ta-life 3
DraPri Guu-ta-life 3
NAN%
Tags
  • NEET Protagonist
  • Airhead Protagonist
  • Royal Heroine
  • Dragon Heroine
  • Comedic Love Triangle
Rating 7.27147 Users
Venus Blood -AfterDays- Episode:5 Onsen
Venus Blood -AfterDays- Episode:5 Onsen'yado no Shugo Megami
NAN%
Tags
  • Straight Lolicon
  • Nursing Handjob
  • Onsen
  • Goddess Heroine
  • Insemination by Non-Humanoids
Rating 6.5731 Users
Akogare no Ano Ko no Musume wa Boku no Yome
Akogare no Ano Ko no Musume wa Boku no Yome
NAN%
Tags
  • Babysitting
  • Sex Involving Children
  • Only Loli Heroines
  • Lolicon
  • Lolicon Protagonist
Rating 6.48124 Users
Hoshi no Furu Oka
Hoshi no Furu Oka
NAN%
Tags
  • Late Branching Plot
  • NVL
  • Photographic Backgrounds
  • High School Student Protagonist
  • Only a Single Heroine
Rating 5.3654 Users
When the Seacats Cry
When the Seacats Cry
NAN%
Tags
  • Metafiction
  • Brief Branches Only
  • Multiple Opening Movies
  • Murder Mystery
  • Episodic Story
Rating 6.8033 Users
Itazura Love Hitoke no Nai Kouen de Shoujo to Ai o Hagukumou
Itazura Love Hitoke no Nai Kouen de Shoujo to Ai o Hagukumou
NAN%
Tags
  • Park
  • Elementary School Student Heroine
  • Hetare Protagonist
  • Otaku Protagonist
  • Unoriginal Soundtrack
Rating 6.8140 Users
Akane no Chiisana Hanabira
Akane no Chiisana Hanabira
28%
Tags
  • In-law Incest
  • Protagonist's Sister-in-Law as a Heroine
  • No Voice Replay
  • Sex Involving Children
  • Save Memo Function
Rating 6.1836 Users
Kekkon Shitai Otoshigoro
Kekkon Shitai Otoshigoro
24%
Tags
  • Interactive Touching Game
  • Protagonist's Niece as a Heroine
  • Straight Lolicon
  • Sex Involving Children
  • Floating Textbox
Rating 6.4635 Users
Naisho no Jikan
Naisho no Jikan
23%
Tags
  • Elementary School Student Heroine
  • Mesugaki Heroine
  • Student-Teacher Romance
  • Teacher Protagonist
  • Lolicon Protagonist
Rating 6.4895 Users
Hajimete no Okaa-san
Hajimete no Okaa-san
18%
Tags
  • Father/Daughter Romance
  • Clothing ON/OFF
  • Lolicon Protagonist
  • Protagonist's Blood-related Daughter as a Heroine
  • Nude Filter
Rating 5.92153 Users
Mayuri no Himitsu
Mayuri no Himitsu
16%
Tags
  • Protagonist's Younger Sister as a Heroine
  • Brother/Sister Incest
  • Sex Involving Children
  • Straight Lolicon
  • Interactive Touching Game
Rating 5.4020 Users
Nekogami-sama to, Nanatsuboshi -Imouto no Ane-
Nekogami-sama to, Nanatsuboshi -Imouto no Ane-
16%
Tags
  • Protagonist's Half-sister as a Heroine
  • Protagonist's Younger Sister as a Heroine
  • Brother/Sister Romance
  • Blood-related Brother/Sister Incest
  • Forbidden Love
Rating 6.73222 Users
Momoiro Renge ~Shimai to Tsumugu Ecchi na Kankei~
Momoiro Renge ~Shimai to Tsumugu Ecchi na Kankei~
15%
Tags
  • Only Protagonist's Sisters as Heroine(s)
  • Defloration During Common Route
  • Brother/Sister Incest
  • Orphan Heroine
  • Sex Under the Necessity
Rating 5.96109 Users
Chinkamo Twins! ~Futago no Imouto-tachi ni Natsukareteru no wa Wakatteta kedo Masaka Ren
Chinkamo Twins! ~Futago no Imouto-tachi ni Natsukareteru no wa Wakatteta kedo Masaka Ren'ai Kanjou ni Kawaru Nante Omottenakatta Ken~
15%
Tags
  • Unnamed Protagonist
  • Blood-related Brother/Sister Incest
  • Only Protagonist's Sisters as Heroine(s)
  • Backlog Jump
  • Twin Sisters as Heroines
Rating 6.00124 Users
Kemonomichi ☆ Girlish Square 2
Kemonomichi ☆ Girlish Square 2
14%
Tags
  • Idol Heroine
  • Unavoidable Harem Ending
  • Cook Heroine
  • Unlockable Sexual Content
  • Mahou Shoujo Heroine
Rating 6.8048 Users
Kemonomichi ☆ Girlish Square LOVE+PLUS
Kemonomichi ☆ Girlish Square LOVE+PLUS
14%
Tags
  • Japanese Idols
  • Mahou Shoujo Heroine
  • Idol Heroine
  • Modern Tsundere Heroine
  • Kuudere Heroine
Rating 6.5152 Users
Uchi no Imouto
Uchi no Imouto
14%
Tags
  • Protagonist's Sister as a Heroine
  • Protagonist's Blood-related Sister as a Heroine
  • Brother/Sister Romance
  • Protagonist's Full Sister as a Heroine
  • Incest Romance
Rating 6.79313 Users
Venus Blood -AfterDays- Episode:5 Onsen
Venus Blood -AfterDays- Episode:5 Onsen'yado no Shugo Megami
13%
Tags
  • Straight Lolicon
  • Nursing Handjob
  • Onsen
  • Goddess Heroine
  • Insemination by Non-Humanoids
Rating 6.5731 Users
Hoshi no Furu Oka
Hoshi no Furu Oka
13%
Tags
  • Late Branching Plot
  • NVL
  • Photographic Backgrounds
  • High School Student Protagonist
  • Only a Single Heroine
Rating 5.3654 Users
Itazura Love Hitoke no Nai Kouen de Shoujo to Ai o Hagukumou
Itazura Love Hitoke no Nai Kouen de Shoujo to Ai o Hagukumou
13%
Tags
  • Park
  • Elementary School Student Heroine
  • Hetare Protagonist
  • Otaku Protagonist
  • Unoriginal Soundtrack
Rating 6.8140 Users
Naisho no Natsuyasumi
Naisho no Natsuyasumi
12%
Tags
  • Only Loli Heroines
  • Lolicon
  • Straight Lolicon
  • Sex Involving Children
  • Loli Heroine
Rating 5.4823 Users
Juukan Roku
Juukan Roku
12%
Tags
  • Prolapse
  • Bestiality
  • Urethral Intercourse
  • Sex Involving Smegma
  • Flat Tints Only
Rating 6.1922 Users
Kemonomichi ☆ Girlish Square
Kemonomichi ☆ Girlish Square
12%
Tags
  • Indecisive Protagonist
  • Mahou Shoujo Heroine
  • Unavoidable Harem Ending
  • Kemonomimi Heroine
  • Comedic Love Triangle
Rating 6.55143 Users
Island Diary
Island Diary
12%
Tags
  • Stranded
  • Harem Ending with Theme
  • Polyamory
  • Kemonomimi Heroine
  • Fictional Modern Day Japanese Island
Rating 6.61285 Users
Imouto Pet ~Repure~
Imouto Pet ~Repure~
12%
Tags
  • Elementary School Student Heroine
  • Voiced Narration
  • Deredere Heroine
  • Brocon Heroine
  • Heroine with Spats
Rating 6.7837 Users
Josou Souseiki
Josou Souseiki
12%
Tags
  • Divine Heroine
  • Only Uke Heroes
  • Priest(ess) Protagonist
  • God Hero
  • Anal Plug Tail
Rating 6.70118 Users
Mama wa Inran Niku Dorei
Mama wa Inran Niku Dorei
12%
Tags
  • Sexual Child Abuse
  • Straight Lolicon
  • Only Loli Heroines
  • Interactive Touching Game
  • Peace Sign Ahegao
Rating 6.9030 Users
Rina no Chiisana Oka
Rina no Chiisana Oka
12%
Tags
  • Lolicon Protagonist
  • No "Keep Voice on Click" Option
  • Interactive Touching Game
  • Loli Support Character
  • Elementary School Student Heroine
Rating 5.9357 Users
Onii-chan, Kiss no Junbi wa Mada Desu ka?
Onii-chan, Kiss no Junbi wa Mada Desu ka?
12%
Tags
  • Harem Ending with Theme
  • Only Blood-related Heroines
  • Pillow Talk
  • Non-twin Heroine Sisters
  • Only Protagonist's Sisters as Heroine(s)
Rating 7.21882 Users
DraPri Guu-ta-life LOVE + PLUS
DraPri Guu-ta-life LOVE + PLUS
12%
Tags
  • Dragon Heroine
  • Comedic Love Triangle
  • Poor Protagonist
  • Muted Obscenities
  • Unavoidable Harem Ending
Rating 6.37218 Users

Imouto to Hokentaiiku 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 (25 total)

NameScoreImportanceWeight
Protagonist's Blood-related Sister as a Heroine3.001.955.84
Straight Lolicon3.001.504.50
Blood-related Brother/Sister Incest3.001.484.45
Only Blood-related Heroines2.002.094.17
Only Protagonist's Sisters as Heroine(s)2.001.993.98
Sex Involving Children2.001.953.90
Only Younger Heroines2.001.943.88
Only Loli Heroines2.001.783.55
Urination Fetish2.001.663.32
Only Virgin Heroines3.001.083.24
Brocon Heroine2.001.613.21
Kinetic Novel3.001.073.20
Only a Single Heroine3.001.023.05
Masturbation2.001.492.98
Student Heroine3.000.992.98
Other Perspectives2.001.132.27
Blowjob2.001.122.24
Nukige3.000.651.95
Lolicon1.001.731.73
Cowgirl2.000.841.67
Doggy Style2.000.801.61
Defloration2.000.761.52
Loli Heroine1.001.191.19
Male Protagonist2.000.300.60
ADV2.000.140.29

Traits (18 total)

NameCharactersImportanceWeight
Student Role21.491.63
Incest Engages in (Sexual)21.471.61
Brother Complex Personality12.061.43
Small Breast Sizes Body12.001.39
Full Brother Role11.951.35
Hair Ribbon Clothes11.801.25
Deredere Personality11.741.21
Naive Personality11.691.17
Pink Eyes11.621.12
Full Sister Role11.561.08
Masturbation Engages in (Sexual)11.390.97
Kid Body11.370.95
Dress Clothes11.250.87
Friendly Personality11.220.84
Spiky Bangs Hair11.000.69
Shoulder-length Hair10.920.64
Virgin Sex Engages in (Sexual)10.850.59
Black Hair10.800.56