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Summary

The summer of Japan is the summer of breasts!? This is a comical story where a boyish girl and a huge-breasted woman who is expected to be a worldwide scientist in the future! They fight over the protagonist, who happens to love big breasts above all! Worried about her breast size, the girl decides to make her bust larger so that she can protect her beloved boy from the seduction of the scientist and make him her boyfriend! [From DLsite English]

Tap~puri Ijitte Ageru♪ ~Chiisaku Natte Cool Beauty na Kikyou Onee-chan ni Shiborare Tsukusu Itazura Kozukuri~
Tap~puri Ijitte Ageru♪ ~Chiisaku Natte Cool Beauty na Kikyou Onee-chan ni Shiborare Tsukusu Itazura Kozukuri~
NAN%
Tags
  • Shota Protagonist
  • Straight Shotacon
  • Handjob
  • Anilingus
  • Impregnation
Rating 6.4322 Users
Binyuu Inmai Haruka "Watashi ni Iyarashii Cosplay Saseru nante... Kono Hentai!"
Binyuu Inmai Haruka "Watashi ni Iyarashii Cosplay Saseru nante... Kono Hentai!"
NAN%
Tags
  • Discipline Committee Leader Protagonist
  • Twin Bellyjob
  • Protagonist's Blood-related Sister as a Heroine
  • Heroine with Spats
  • Bunnygirl Cosplay
Rating 7.0924 Users
Boku Dake ga Shiranai Koibito to Shimai ga Bitch Gal ni Natta Riyuu
Boku Dake ga Shiranai Koibito to Shimai ga Bitch Gal ni Natta Riyuu
NAN%
Tags
  • Netorare Type B
  • Impregnation by Others
  • Drug Use
  • Prostitution
  • Netorare
Rating 6.0129 Users
Binary Pot
Binary Pot
NAN%
Tags
  • Waitress Heroine
  • Fictional World
  • Ponytail Heroine
  • Twin Tail Heroine
  • Branching Plot
Rating 5.9524 Users
Mama Mama Mama 2
Mama Mama Mama 2
NAN%
Tags
  • Mother/Son Romance
  • Adult Breast Feeding
  • Gaping
  • Oyakodon
  • Discreet Masturbation
Rating 6.2733 Users
Anata to Mita Sakura ~Shimaizuma~
Anata to Mita Sakura ~Shimaizuma~
NAN%
Tags
  • Protagonist's Sister-in-Law as a Heroine
  • Hetare Protagonist
  • Pantyjob
  • Widow Heroine
  • Heroine with Kimono
Rating 6.7720 Users
Maou to Seijo ~Norowareshi Injoku no Rinne~
Maou to Seijo ~Norowareshi Injoku no Rinne~
NAN%
Tags
  • Maou Protagonist
  • Christian Mythology
  • Blowbang
  • Internal Exhibition of Sex
  • No "Keep Voice on Click" Option
Rating 6.4721 Users
Hatsujou Exorcist! ~Harau to Hatsujou Suru Ojou-sama ni Tsukaetemasu.~
Hatsujou Exorcist! ~Harau to Hatsujou Suru Ojou-sama ni Tsukaetemasu.~
NAN%
Tags
  • Yuki-onna Heroine
  • Butler Protagonist
  • Dragon Heroine
  • Exorcism
  • Sex Under the Necessity
Rating 6.6432 Users
Sensei o Haramaseyou! ~Hiyoko no Noroi de Toumeika Suru Ore!?~
Sensei o Haramaseyou! ~Hiyoko no Noroi de Toumeika Suru Ore!?~
NAN%
Tags
  • P.E. Teacher Heroine
  • Principal Heroine
  • Heroine with Spats
  • School Nurse Heroine
  • Heroine with Tights
Rating 6.4650 Users
Aneboku ~Onee-chan wa Bijin 3 Shimai~
Aneboku ~Onee-chan wa Bijin 3 Shimai~
NAN%
Tags
  • Brother/Sister Romance
  • Protagonist with Phimosis
  • Romancing a Family
  • Protagonist's Non-blood-related Sister as a Heroine
  • Single Hole Multiple Objects Insertion (obsolete)
Rating 7.0922 Users
Trouble Home! ~Giri no Haha to Imouto wa Koigataki~
Trouble Home! ~Giri no Haha to Imouto wa Koigataki~
NAN%
Tags
  • Oyakodon Ending
  • Heroine with Ahoge
  • Non-blood-related Mother/Son Incest
  • Protagonist's Non-blood-related Mother as a Heroine
  • Non-blood-related Incest
Rating 6.9335 Users
Ojou-sama wa Katai no ga Osuki! ~Shinsei Naru Joshi Ryou Nikki~
Ojou-sama wa Katai no ga Osuki! ~Shinsei Naru Joshi Ryou Nikki~
NAN%
Tags
  • Cook Protagonist
  • Gymnastic Heroine
  • Impregnation Choice
  • Hotblooded Protagonist
  • Artist Heroine
Rating 6.9939 Users
Oharai Onee-san! ~Otouto o Yuuwaku Shinasai~
Oharai Onee-san! ~Otouto o Yuuwaku Shinasai~
NAN%
Tags
  • Occult Club
  • Spontaneous Power-ups
  • Homosexual Support Character
  • Blood-related Brother/Sister Incest
  • Heroine with Wings
Rating 6.5220 Users
Meimon Joshikou Ryokou ~Ore Dake Otoko Nandesu ga!?~
Meimon Joshikou Ryokou ~Ore Dake Otoko Nandesu ga!?~
NAN%
Tags
  • Trap Protagonist
  • Single Buttjob
  • All-girls School
  • Half-Japanese Heroine
  • Only Virgin Heroines
Rating 7.1022 Users
Chocolate Princess! ~Ingoku no!? Homestay~
Chocolate Princess! ~Ingoku no!? Homestay~
NAN%
Tags
  • Huge Insertion
  • Mermaid Heroine
  • Gaping
  • Inflation
  • Heroine with Visible Panties
Rating 7.0127 Users
Toppatsusei Milk Musume Chika "Mou, Papa no Sei de Ippai Dechauu!"
Toppatsusei Milk Musume Chika "Mou, Papa no Sei de Ippai Dechauu!"
NAN%
Tags
  • Protagonist's Blood-related Daughter as a Heroine
  • Timed Choices
  • Blood-related Father/Daughter Incest
  • Fathercon Heroine
  • Breast Expansion
Rating 6.9651 Users
Danchi Wife ~Hitozuma Nude Model no Kenshin~
Danchi Wife ~Hitozuma Nude Model no Kenshin~
NAN%
Tags
  • Painter Protagonist
  • Widow Heroine
  • Harem Ending
  • Threesome Ending
  • Adult Breast Feeding
Rating 7.0926 Users
Hitozuma Dorei Keikaku
Hitozuma Dorei Keikaku
NAN%
Tags
  • Urination Fetish
  • Revenge
  • Dramatic Love Triangle
  • Heroine with Garter Belt
  • Protagonist's Sister as a Support Character
Rating 6.9124 Users
Oku-san, Kane ga Nai nara Karada de Haratte Moraimashou ka? ~Hito no Tsuma-tachi no Ketsu o Narabete Tabekurabe! Netori Kissa Settai!~
Oku-san, Kane ga Nai nara Karada de Haratte Moraimashou ka? ~Hito no Tsuma-tachi no Ketsu o Narabete Tabekurabe! Netori Kissa Settai!~
NAN%
Tags
  • Sex Involving Prostitution
  • Model Heroine
  • Waitress Heroine
  • Cafe
  • Heroine with Pubic Hair
Rating 5.8820 Users
Seikatsu Shidouin ~Kimo-o ga Funin ni Nayamu Pure na Wakazuma ni Tetori Ashitori Akume Lesson! Love Love Netori Tanezuke de Risou no Yome ni!~
Seikatsu Shidouin ~Kimo-o ga Funin ni Nayamu Pure na Wakazuma ni Tetori Ashitori Akume Lesson! Love Love Netori Tanezuke de Risou no Yome ni!~
NAN%
Tags
  • Consensual Erotic Humiliation
  • Ugly Protagonist
  • Hotel
  • Vaginal Gaping
  • Peace Sign Ahegao
Rating 6.1122 Users
Lilith-Izm07 ~Ore no Pet Hen~
Lilith-Izm07 ~Ore no Pet Hen~
NAN%
Tags
  • Single Hole Multiple Tentacle Penetration (obsolete)
  • All the Way Through
  • Yuki-onna Heroine
  • BDSM
  • Anthology
Rating 6.2823 Users
Chichigami-sama no Iutoori!
Chichigami-sama no Iutoori!
NAN%
Tags
  • Breast Expansion
  • Cheerleader Heroine
  • Breast Smothering
  • Adult Breast Feeding
  • Student Council President Heroine
Rating 6.7735 Users
Boku no Hitozuma Onee-san ~M na Hitozuma x S na Miboujin~
Boku no Hitozuma Onee-san ~M na Hitozuma x S na Miboujin~
NAN%
Tags
  • Shota Protagonist
  • Straight Shotacon
  • Sister/Sister Incest
  • Heroine with Garter Belt
  • Widow Heroine
Rating 6.9620 Users
Haramasete Seiryuu-kun! ~Jinginaki Onna no Tatakai~
Haramasete Seiryuu-kun! ~Jinginaki Onna no Tatakai~
NAN%
Tags
  • Duel
  • Comedic Love Triangle
  • Popular Protagonist
  • Heroine with Tattoo
  • No "Keep Voice on Click" Option
Rating 6.2523 Users
Itazura ~Boku Dake no Zettai Ryouiki~
Itazura ~Boku Dake no Zettai Ryouiki~
38%
Tags
  • Chikan Heroine
  • Hotel
  • Trains
  • Voiced Thoughts
  • Pregnancy Good Ending
Rating 6.1820 Users
Idol Pafupafu Management -Geinou Musume o H ni Bust UP Producer-
Idol Pafupafu Management -Geinou Musume o H ni Bust UP Producer-
29%
Tags
  • Japanese Idols
  • Dying Protagonist
  • Breast Expansion
  • Leader Heroine
  • Chuunibyou Heroine
Rating 7.1346 Users
Meimon Joshikou Ryokou ~Ore Dake Otoko Nandesu ga!?~
Meimon Joshikou Ryokou ~Ore Dake Otoko Nandesu ga!?~
29%
Tags
  • Trap Protagonist
  • Single Buttjob
  • All-girls School
  • Half-Japanese Heroine
  • Only Virgin Heroines
Rating 7.1022 Users
Oharai Onee-san! ~Otouto o Yuuwaku Shinasai~
Oharai Onee-san! ~Otouto o Yuuwaku Shinasai~
28%
Tags
  • Occult Club
  • Spontaneous Power-ups
  • Homosexual Support Character
  • Blood-related Brother/Sister Incest
  • Heroine with Wings
Rating 6.5220 Users
Ojou-sama wa Katai no ga Osuki! ~Shinsei Naru Joshi Ryou Nikki~
Ojou-sama wa Katai no ga Osuki! ~Shinsei Naru Joshi Ryou Nikki~
28%
Tags
  • Cook Protagonist
  • Gymnastic Heroine
  • Impregnation Choice
  • Hotblooded Protagonist
  • Artist Heroine
Rating 6.9939 Users
Aneboku ~Onee-chan wa Bijin 3 Shimai~
Aneboku ~Onee-chan wa Bijin 3 Shimai~
28%
Tags
  • Brother/Sister Romance
  • Protagonist with Phimosis
  • Romancing a Family
  • Protagonist's Non-blood-related Sister as a Heroine
  • Single Hole Multiple Objects Insertion (obsolete)
Rating 7.0922 Users
Trouble Home! ~Giri no Haha to Imouto wa Koigataki~
Trouble Home! ~Giri no Haha to Imouto wa Koigataki~
28%
Tags
  • Oyakodon Ending
  • Heroine with Ahoge
  • Non-blood-related Mother/Son Incest
  • Protagonist's Non-blood-related Mother as a Heroine
  • Non-blood-related Incest
Rating 6.9335 Users
Hatsujou Exorcist! ~Harau to Hatsujou Suru Ojou-sama ni Tsukaetemasu.~
Hatsujou Exorcist! ~Harau to Hatsujou Suru Ojou-sama ni Tsukaetemasu.~
27%
Tags
  • Yuki-onna Heroine
  • Butler Protagonist
  • Dragon Heroine
  • Exorcism
  • Sex Under the Necessity
Rating 6.6432 Users
Sensei o Haramaseyou! ~Hiyoko no Noroi de Toumeika Suru Ore!?~
Sensei o Haramaseyou! ~Hiyoko no Noroi de Toumeika Suru Ore!?~
27%
Tags
  • P.E. Teacher Heroine
  • Principal Heroine
  • Heroine with Spats
  • School Nurse Heroine
  • Heroine with Tights
Rating 6.4650 Users
Toppatsusei Milk Musume Chika "Mou, Papa no Sei de Ippai Dechauu!"
Toppatsusei Milk Musume Chika "Mou, Papa no Sei de Ippai Dechauu!"
27%
Tags
  • Protagonist's Blood-related Daughter as a Heroine
  • Timed Choices
  • Blood-related Father/Daughter Incest
  • Fathercon Heroine
  • Breast Expansion
Rating 6.9651 Users
Hitozuma Dorei Keikaku
Hitozuma Dorei Keikaku
25%
Tags
  • Urination Fetish
  • Revenge
  • Dramatic Love Triangle
  • Heroine with Garter Belt
  • Protagonist's Sister as a Support Character
Rating 6.9124 Users
Seikatsu Shidouin ~Kimo-o ga Funin ni Nayamu Pure na Wakazuma ni Tetori Ashitori Akume Lesson! Love Love Netori Tanezuke de Risou no Yome ni!~
Seikatsu Shidouin ~Kimo-o ga Funin ni Nayamu Pure na Wakazuma ni Tetori Ashitori Akume Lesson! Love Love Netori Tanezuke de Risou no Yome ni!~
25%
Tags
  • Consensual Erotic Humiliation
  • Ugly Protagonist
  • Hotel
  • Vaginal Gaping
  • Peace Sign Ahegao
Rating 6.1122 Users
Chichigami-sama no Iutoori!
Chichigami-sama no Iutoori!
25%
Tags
  • Breast Expansion
  • Cheerleader Heroine
  • Breast Smothering
  • Adult Breast Feeding
  • Student Council President Heroine
Rating 6.7735 Users
Haramasete Seiryuu-kun! ~Jinginaki Onna no Tatakai~
Haramasete Seiryuu-kun! ~Jinginaki Onna no Tatakai~
25%
Tags
  • Duel
  • Comedic Love Triangle
  • Popular Protagonist
  • Heroine with Tattoo
  • No "Keep Voice on Click" Option
Rating 6.2523 Users
Sukechatte!! ~Kyuushi ni Isshou o Ete Noumitsu Second Life~
Sukechatte!! ~Kyuushi ni Isshou o Ete Noumitsu Second Life~
25%
Tags
  • Protagonist with Superpowered Side
  • Invisibility
  • High Amount of Special Effects
  • Shapeshifting
  • Defloration During Common Route
Rating 6.6022 Users
Mothercon Tengoku ~Doukyuusei no Hahaoya-tachi o Kyokon de Boku Dake no Hara Mama ni!~
Mothercon Tengoku ~Doukyuusei no Hahaoya-tachi o Kyokon de Boku Dake no Hara Mama ni!~
25%
Tags
  • Heroine with Children
  • Protagonist with Phimosis
  • Protagonist with Glasses
  • Only Adult Heroines
  • Single Ending
Rating 6.1435 Users
Toraba!
Toraba!
25%
Tags
  • Romancing a Family
  • Swimming Club
  • Class President Heroine
  • Foolish Friend
  • Oyakodon Ending
Rating 6.9623 Users
Majo-gari no Kishi ~Jinkaku Ten
Majo-gari no Kishi ~Jinkaku Ten'i no Ori~
24%
Tags
  • Medieval Fantasy
  • Brother/Sister Incest
  • Body Swapping
  • Gaping
  • Incest
Rating 5.9823 Users
Onee-san ☆ Hara Mix
Onee-san ☆ Hara Mix
24%
Tags
  • Shinigami Heroine
  • Dormitory Manager Heroine
  • Sex Under the Necessity
  • Impregnation
  • Widow Heroine
Rating 6.7825 Users
Kyonyuu Dosukebe Gakuen ~Shojo-tachi no Tomaranai Koshizukai~
Kyonyuu Dosukebe Gakuen ~Shojo-tachi no Tomaranai Koshizukai~
24%
Tags
  • Unavoidable Harem Ending
  • Single Ending
  • Pantyjob
  • Single Buttjob
  • Yandere Heroine
Rating 6.6430 Users
Ane☆Hara-mix 2
Ane☆Hara-mix 2
23%
Tags
  • Shinigami Heroine
  • Succubus Heroine
  • Inbreeding
  • Non-blood-related Brother/Sister Incest
  • Impregnation
Rating 6.8324 Users
Maid-san to Boin Damashii
Maid-san to Boin Damashii
23%
Tags
  • Maid Support Character
  • Hero(ine) Selection
  • Wealthy Protagonist
  • Chinese Heroine
  • Ejaculation Forewarner
Rating 7.3468 Users
Oshirikko Venus 2
Oshirikko Venus 2
23%
Tags
  • Non-penetrative Sex
  • Big Ass Heroine
  • Perverted Protagonist
  • Twin Footjob
  • Sex on a Roof
Rating 7.2831 Users

Poyopoyo Oppai Summer 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 (48 total)

NameScoreImportanceWeight
Breast Expansion2.501.964.89
Heroine with Spats2.002.384.77
Scientist Heroine2.002.324.64
Heroine with Shorts2.002.094.18
Heroine with Intake Hairstyle2.001.993.98
Blowjob Duck Face2.001.903.81
Heroine with Tights2.001.833.66
Bokukko Heroine2.001.803.59
Threesome Ending2.001.723.45
Heroine with Swimsuits2.001.623.25
Internal Exhibition of Sex2.001.543.09
Twin Bellyjob1.003.093.09
Tomboy Heroine2.001.513.03
Teacher Heroine2.001.352.71
Student Protagonist2.001.242.47
Bathroom Sex2.001.182.37
Pregnant Sex2.001.162.32
Breast Smothering1.002.272.27
Protagonist's Childhood Friend as a Heroine2.001.132.26
Sex with Protagonist Only2.001.122.24
Heroine with Glasses2.001.112.21
Sex in Public Places2.001.072.15
Sitting Sex2.001.052.10
Standing Sex2.001.052.09
High Sexual Content2.001.032.06
Mirror Sex1.002.022.02
Nipple Insertion1.002.022.02
Outdoor Sex2.000.991.97
Student Heroine2.000.971.94
Twin Blowjob1.501.281.91
Tribadism on Penis1.001.851.85
Group Sex of One Male and Several Females2.000.901.80
Clothing Damage1.001.751.75
Adult Breast Feeding1.001.691.69
Twin Boobjob1.001.671.67
Cowgirl2.000.831.65
Facesitting1.001.641.64
Nukige2.500.641.61
Doggy Style2.000.791.58
Deepthroat1.001.511.51
Sex in Water1.001.401.40
Heroine with Zettai Ryouiki1.001.371.37
Ahegao1.001.241.24
Quickie Fix Position1.001.111.11
Sixty-nine1.001.061.06
Naked Sprites1.001.051.05
Missionary Position1.000.930.93
ADV2.000.140.29

Traits (95 total)

NameCharactersImportanceWeight
Twin Bellyjob Engages in (Sexual)23.213.52
Mitre Clothes13.352.32
Lace Lingerie Clothes22.092.30
Tribadism on Penis Engages in (Sexual)22.082.29
Platform Shoes Clothes12.932.03
Reverse Spitroast Subject of (Sexual)21.842.03
Twin Boobjob Engages in (Sexual)21.761.93
Breast Smothering Engages in (Sexual)12.681.86
Shorts Clothes21.671.84
Intake Hair21.661.83
Hair Beads Hair12.521.75
Nipple Insertion Subject of (Sexual)12.431.69
Pregnant Sex Engages in (Sexual)21.531.68
Shawl Clothes12.391.66
Handbag Items12.311.60
Mirror Sex Engages in (Sexual)12.301.59
Group Sex Engages in (Sexual)21.441.58
Twin Blowjob Engages in (Sexual)21.441.58
Scientist Role12.271.57
Adult Breast Feeding (obsolete) Engages in (Sexual)12.231.54
Blowjob Duck Face Engages in (Sexual)12.231.54
Micro Bikini Clothes12.221.54
Robot Role12.211.53
Torn Pantyhose (damaged) Clothes12.201.53
Nipple Sucking Subject of (Sexual)21.391.53
Spats Clothes12.191.52
Torn Clothing Clothes12.151.49
Shimapan Clothes12.121.47
Ahoge Hair21.311.44
Old Type School Swimsuit Clothes12.081.44
Wristband Clothes12.001.39
Facesitting Engages in (Sexual)12.001.39
Tomboy Personality11.971.37
Vaginal Gaping Engages in (Sexual)11.961.36
Sandals Clothes11.961.36
Fang Body11.881.30
Standing Sex Subject of (Sexual)21.181.29
Outdoor Sex Engages in (Sexual)21.161.27
Deepthroat Engages in (Sexual)11.811.26
String Ribbon Tie Clothes11.811.26
Short (obsolete) Body11.801.25
Lab Coat Clothes11.791.24
Braid Hair11.781.23
Sports Shoes Clothes11.731.20
Hoodie Clothes11.721.19
Cape Clothes11.701.18
Parted to Side Hair21.071.17
Boobjob Engages in (Sexual)21.061.17
Teasing Subject of11.681.16
Cyan Eyes11.671.16
Sweater Clothes11.641.13
Sex in Water Engages in (Sexual)11.561.08
Teacher Role11.541.07
Cowgirl Subject of (Sexual)20.951.05
Student Role11.481.03
Blouse Clothes11.481.03
Sailor School Uniform Clothes11.481.03
Big Breast Sizes Body11.471.02
Pissing Engages in (Sexual)11.461.01
Headband Clothes11.430.99
Tank Top Clothes11.430.99
Pantyhose Clothes11.420.98
Bathroom Sex Engages in (Sexual)11.400.97
Hairpin Clothes11.390.96
Kid Body11.360.94
White Hair11.340.93
Virgin Sex Engages in (Sexual)20.840.92
Ahegao Engages in (Sexual)11.330.92
Skirt Clothes11.330.92
Pink Hair11.320.92
T-shirt Clothes11.320.91
Belt Clothes11.280.89
Sex in Public Places Engages in (Sexual)11.260.88
Sixty-nine Engages in (Sexual)11.250.87
Childhood Friend Role11.250.87
Blowjob Engages in (Sexual)20.760.83
Anal Sex Subject of (Sexual)11.190.82
Butterfly Subject of (Sexual)11.170.81
Handjob Engages in (Sexual)11.160.80
Missionary Subject of (Sexual)11.110.77
Glasses Clothes11.080.75
Quickie Fix Subject of (Sexual)11.080.75
Sitting Sex Subject of (Sexual)11.050.73
Violet Eyes11.040.72
Thigh-high Stockings Clothes11.030.72
Sidehair Hair10.970.68
Doggy Style Subject of (Sexual)10.920.64
Blond Hair10.880.61
Blue Eyes10.800.55
Waist Length+ Hair10.800.55
Young-adult Body10.770.54
Long Hair10.750.52
School Uniform Clothes10.730.51
Teen Body10.610.42
Short Hair10.610.42