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Summary

Unlike the sequels that follows you take on the role of Kenta, a high school student trapped by Isaku, the eldest brother of the Itou Family on the last floor of an abandoned school building together with fellow classmates and a teacher. The main objective of the game is to have the player and his companions escape from a locked school building, and to avoid having your companions captured by Isaku. The only way out is through a stairwell, the doors of which are locked on every floor. The player must search the rooms on each floor for clues and items that will lead him to locate the keys that will open the stairwell doors and allow him to descend to the next level and ultimately to a final confrontation with Isaku himself.

Chocolat ~maid cafe "curio"~
Chocolat ~maid cafe "curio"~
NAN%
Tags
  • Baker Heroine
  • Slice of Life Drama
  • Brother/Sister Romance
  • Protagonist's Younger Sister as a Heroine
  • Late Sexual Content
Rating 7.0989 Users
Biniku no Kaori - Bangai Hen
Biniku no Kaori - Bangai Hen
NAN%
Tags
  • Divorcee Heroine
  • Onsen
  • Long Sexual Scenes
  • Western-style Manor
  • Marriage Ending
Rating 6.90100 Users
Maro no Kanja wa Gatenkei
Maro no Kanja wa Gatenkei
NAN%
Tags
  • Villainous Protagonist
  • Sexual Corruption
  • High Amount of Bad Endings
  • Perverted Protagonist
  • Save Memo Function
Rating 7.51170 Users
Atori no Sora to Shinchuu no Tsuki
Atori no Sora to Shinchuu no Tsuki
NAN%
Tags
  • Orphan Heroine
  • Slice of Life Drama
  • Traditionalist Family
  • Blind Heroine
  • Conspiracy
Rating 7.3022 Users
Sense Off ~A Sacred Story in the Wind~
Sense Off ~A Sacred Story in the Wind~
NAN%
Tags
  • Only Avoidable Sexual Content
  • Non Looping BGM
  • Long Common Route
  • Short Sexual Scenes
  • Late Sexual Content
Rating 7.0638 Users
Hateshinaku Aoi, Kono Sora no Shita de...
Hateshinaku Aoi, Kono Sora no Shita de...
NAN%
Tags
  • Optional Vertical Text
  • Ambient Sounds
  • Drama
  • Countryside
  • Vertically Oriented Text
Rating 7.5456 Users
EVE burst error
EVE burst error
NAN%
Tags
  • 90's
  • Smoker Heroine
  • No Quick Save/Load
  • Private Detective Protagonist
  • Fictional Modern Day Earth
Rating 7.59342 Users
Kawarazaki-ke no Ichizoku 2
Kawarazaki-ke no Ichizoku 2
NAN%
Tags
  • Butler Support Character
  • Breast Press
  • Built-in Flowchart
  • Utsuge
  • Desperation
Rating 7.7776 Users
Kakyuusei 2
Kakyuusei 2
NAN%
Tags
  • Varying Ending Songs
  • Nanpa
  • Dating Simulation
  • Orekko Heroine
  • Pragmatic Heroine
Rating 7.2335 Users
Doukyuusei 2
Doukyuusei 2
NAN%
Tags
  • Nanpa
  • 90's
  • Guide Heroine
  • Framed GUI
  • More Than Seven Heroines
Rating 7.6776 Users
Kakyuusei
Kakyuusei
NAN%
Tags
  • Nanpa
  • 90's
  • Framed GUI
  • More Than Seven Heroines
  • Dating Simulation
Rating 7.7145 Users
Kawarazaki-ke no Ichizoku
Kawarazaki-ke no Ichizoku
NAN%
Tags
  • Madness
  • Western-style Manor
  • Ending Scene Recollection
  • Smoker Protagonist
  • High Amount of Bad Endings
Rating 6.3751 Users
Doukyuusei
Doukyuusei
NAN%
Tags
  • Nanpa
  • Sandbox
  • 90's
  • Popular Protagonist
  • Heroine in Relationship with Other(s)
Rating 7.4085 Users
Nonomura Byouin no Hitobito
Nonomura Byouin no Hitobito
NAN%
Tags
  • Private Detective Protagonist
  • Nurse Heroine
  • Ending List
  • Hospital
  • Hint Corner
Rating 6.8741 Users
Doko e Iku no, Ano Hi
Doko e Iku no, Ano Hi
NAN%
Tags
  • Unrequited Love
  • Psychological Trauma
  • Utsuge
  • Group of Friends
  • Non-blood-related Brother/Sister Incest
Rating 7.2038 Users
ELLE
ELLE
NAN%
Tags
  • Sexual Scenes with Gameplay
  • American Heroine
  • Gore
  • Post Apocalyptic Earth
  • Map Movement
Rating 7.1220 Users
Mama Love
Mama Love
NAN%
Tags
  • Lazy Heroine
  • Writer Heroine
  • Apartment Building
  • American Heroine
  • Heroine with Shorts
Rating 7.2235 Users
Dragon Knight 4
Dragon Knight 4
NAN%
Tags
  • Shotacon Heroine
  • Action
  • RPG
  • Framed GUI
  • Past Setting in a Fictional World
Rating 7.4039 Users
Tsukikagerou
Tsukikagerou
NAN%
Tags
  • Taishou Era
  • Past
  • Shinto Shrine
  • Mischievous Protagonist
  • Nightmare
Rating 7.2223 Users
Shinsetsu Ryouki no Ori
Shinsetsu Ryouki no Ori
NAN%
Tags
  • Private Detective Protagonist
  • Cook Heroine
  • Amusement Park
  • Avoidable Rape
  • Protagonist's Boss as a Heroine
Rating 7.4523 Users
WORDS WORTH
WORDS WORTH
NAN%
Tags
  • Dungeon Crawling Game
  • Non-heroine Only Unavoidable Rape
  • War
  • Comedy Rape
  • Medieval Fantasy
Rating 7.30203 Users
Boku no Kanojo wa Gatenkei/Kanojo ga Shita Koto, Boku ga Sareta Koto/Kyonyuu Tsuma Kanzen Hokaku Keikaku/Boku no Tsuma ga Aitsu ni Netoraremashita.
Boku no Kanojo wa Gatenkei/Kanojo ga Shita Koto, Boku ga Sareta Koto/Kyonyuu Tsuma Kanzen Hokaku Keikaku/Boku no Tsuma ga Aitsu ni Netoraremashita.
NAN%
Tags
  • Passage of Time
  • Protagonist's Wife as a Heroine
  • In Medias Res
  • Normal Scene Recollection
  • Central Heroine
Rating 7.78365 Users
Love Letter
Love Letter
NAN%
Tags
  • No Skip Read Text Option
  • Suspense
  • Graphic Violence
  • Depression
  • Psychological Trauma
Rating 7.0125 Users
Ningen Debris ~Konna Jibun ni Dare ga Shita?~
Ningen Debris ~Konna Jibun ni Dare ga Shita?~
NAN%
Tags
  • Animation Toggle
  • Jealousy
  • Long Sexual Scenes
  • Sex on a Roof
  • Bad Endings with Story
Rating 7.30150 Users
Kisaku
Kisaku
52%
Tags
  • Ugly Protagonist
  • Rape with Blackmail
  • Rapist Protagonist
  • Simulation Game
  • Perverted Protagonist
Rating 7.9857 Users
Shuusaku
Shuusaku
48%
Tags
  • Dormitory Manager Protagonist
  • Ugly Protagonist
  • Panchira
  • Separate Windows
  • School Dormitory
Rating 7.30101 Users
Nonomura Byouin no Hitobito
Nonomura Byouin no Hitobito
38%
Tags
  • Private Detective Protagonist
  • Nurse Heroine
  • Ending List
  • Hospital
  • Hint Corner
Rating 6.8741 Users
Doukyuusei
Doukyuusei
33%
Tags
  • Nanpa
  • Sandbox
  • 90's
  • Popular Protagonist
  • Heroine in Relationship with Other(s)
Rating 7.4085 Users
Kawarazaki-ke no Ichizoku
Kawarazaki-ke no Ichizoku
33%
Tags
  • Madness
  • Western-style Manor
  • Ending Scene Recollection
  • Smoker Protagonist
  • High Amount of Bad Endings
Rating 6.3751 Users
Doukyuusei 2
Doukyuusei 2
29%
Tags
  • Nanpa
  • 90's
  • Guide Heroine
  • Framed GUI
  • More Than Seven Heroines
Rating 7.6776 Users
Kakyuusei
Kakyuusei
29%
Tags
  • Nanpa
  • 90's
  • Framed GUI
  • More Than Seven Heroines
  • Dating Simulation
Rating 7.7145 Users
Kawarazaki-ke no Ichizoku 2
Kawarazaki-ke no Ichizoku 2
28%
Tags
  • Butler Support Character
  • Breast Press
  • Built-in Flowchart
  • Utsuge
  • Desperation
Rating 7.7776 Users
Kakyuusei 2
Kakyuusei 2
23%
Tags
  • Varying Ending Songs
  • Nanpa
  • Dating Simulation
  • Orekko Heroine
  • Pragmatic Heroine
Rating 7.2335 Users
ELLE
ELLE
20%
Tags
  • Sexual Scenes with Gameplay
  • American Heroine
  • Gore
  • Post Apocalyptic Earth
  • Map Movement
Rating 7.1220 Users
Dragon Knight 4
Dragon Knight 4
20%
Tags
  • Shotacon Heroine
  • Action
  • RPG
  • Framed GUI
  • Past Setting in a Fictional World
Rating 7.4039 Users
Shinsetsu Ryouki no Ori
Shinsetsu Ryouki no Ori
19%
Tags
  • Private Detective Protagonist
  • Cook Heroine
  • Amusement Park
  • Avoidable Rape
  • Protagonist's Boss as a Heroine
Rating 7.4523 Users
Boku no Kanojo wa Gatenkei/Kanojo ga Shita Koto, Boku ga Sareta Koto/Kyonyuu Tsuma Kanzen Hokaku Keikaku/Boku no Tsuma ga Aitsu ni Netoraremashita.
Boku no Kanojo wa Gatenkei/Kanojo ga Shita Koto, Boku ga Sareta Koto/Kyonyuu Tsuma Kanzen Hokaku Keikaku/Boku no Tsuma ga Aitsu ni Netoraremashita.
18%
Tags
  • Passage of Time
  • Protagonist's Wife as a Heroine
  • In Medias Res
  • Normal Scene Recollection
  • Central Heroine
Rating 7.78365 Users
Ningen Debris ~Konna Jibun ni Dare ga Shita?~
Ningen Debris ~Konna Jibun ni Dare ga Shita?~
17%
Tags
  • Animation Toggle
  • Jealousy
  • Long Sexual Scenes
  • Sex on a Roof
  • Bad Endings with Story
Rating 7.30150 Users
Shin Mikagura Shoujo Tanteidan
Shin Mikagura Shoujo Tanteidan
17%
Tags
  • Taishou Era
  • No Protagonist
  • Private Detective Hero
  • Murder Mystery
  • Disappearance
Rating 7.3720 Users
Maro no Kanja wa Gatenkei 3 Kanketsuhen
Maro no Kanja wa Gatenkei 3 Kanketsuhen
17%
Tags
  • Sexual Fantasizing
  • Onsen
  • Married Heroine
  • One True End
  • Sounds of Copulation
Rating 7.5792 Users
Yakin Byoutou
Yakin Byoutou
17%
Tags
  • Specula (Sexual)
  • Medical Doctor Protagonist
  • Panty Gag
  • Hospital
  • Nurse Heroine
Rating 6.9347 Users
Doukoku Soshite...
Doukoku Soshite...
16%
Tags
  • Suspense
  • Archer Heroine
  • Read Text Marking
  • Western-style Manor
  • Changeable Font
Rating 7.3132 Users
Biniku no Kaori ~Netori Netorare Yari Yarare~
Biniku no Kaori ~Netori Netorare Yari Yarare~
16%
Tags
  • Tutor Protagonist
  • Reverse Netorare
  • Ending Scene Recollection
  • Lots of Event CGs
  • Panchira
Rating 7.92441 Users
Wakazuma Mangekyou
Wakazuma Mangekyou
16%
Tags
  • Rapist Protagonist
  • Netori
  • Rape with Blackmail
  • Married Heroine
  • Lots of Choices
Rating 7.0542 Users
Suzukuri Dragon
Suzukuri Dragon
15%
Tags
  • Dragon Protagonist
  • Tower Defense
  • Middle Ages Europe
  • New Game Plus
  • Ending Scene Recollection
Rating 7.5588 Users
Shoin, Aruiwa Ushinawareta Yume no Monogatari.
Shoin, Aruiwa Ushinawareta Yume no Monogatari.
15%
Tags
  • Mind Screw
  • Multiple Route Mystery
  • Confinement
  • Unavoidable Heroine Rape by the Protagonist
  • Western-style Manor
Rating 7.5276 Users
Extravaganza ~Mushi Mederu Shoujo~
Extravaganza ~Mushi Mederu Shoujo~
15%
Tags
  • Choosing Factions
  • Genetic Research
  • Coming-of-Age Drama
  • Completion Status Indicator
  • Built-in Flowchart
Rating 8.07137 Users
Be-Yond ~Kurodaishou ni Mirareteru~
Be-Yond ~Kurodaishou ni Mirareteru~
15%
Tags
  • Voice Only Parts
  • Mid-game Videos
  • Save Memo Function
  • Future Setting in a Fictional World
  • Spaceship
Rating 7.6423 Users

Isaku 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 (35 total)

NameScoreImportanceWeight
Framed GUI2.002.595.19
Panchira2.502.065.16
Confinement3.001.695.07
Netorare Type C2.002.535.07
Life and Death Drama3.001.654.96
Interactive Adventure Game2.831.584.47
Map Movement3.001.313.93
School2.601.513.92
High Amounts of Rape2.331.543.59
Pixel Art2.001.773.53
Heroine with Small Breasts (Non-Loli)2.001.713.42
Shy Heroine2.001.703.39
Rope Bondage2.001.693.39
Kuudere Heroine2.001.693.37
Bad Endings with Story2.251.403.15
Murder Mystery1.751.723.02
High School Student Heroine3.000.852.55
Single Handjob2.001.252.51
Heroine with Sexual Experience2.001.222.43
High School Student Protagonist2.001.212.42
Teacher Heroine1.751.362.39
Student Protagonist1.601.262.01
Rape1.601.231.96
Heroine with Glasses1.751.111.95
Single Blowjob2.000.971.93
Heroine with Big Breasts2.000.851.71
Student Heroine1.600.991.59
Tomboy Heroine1.001.511.51
Pissing1.001.441.44
Cowgirl1.670.841.40
Doggy Style1.670.801.34
Defloration1.670.761.27
Male Protagonist2.250.300.68
Late Sexual Content0.331.780.59
ADV2.330.150.34

Traits (144 total)

NameCharactersImportanceWeight
Twelfth Grader Role82.074.55
Confinement Subject of91.764.05
Rope Bondage Subject of (Sexual)71.673.48
String Ribbon Tie Clothes41.822.93
Coward Personality22.522.77
Classmate Role81.232.70
Pubic Hair Hair61.342.60
Ribbon Hair Accessory Clothes31.652.29
Masculine Speech Personality13.282.28
Janitor Role13.202.22
Bondage Sex Subject of (Sexual)31.572.18
School Tennis Club Member Role12.982.06
School Newspaper Club Member Role12.892.00
Earrings Clothes31.421.97
Mullet Hair12.821.95
Friend Role41.201.94
Envious Personality12.731.89
Stubborn Personality21.681.84
Small Breasts Body21.671.83
Pubic Hair Shaving Subject of (Sexual)12.601.80
Camera Items12.561.77
Ugly Body12.551.77
Sweatpants Clothes12.481.72
Homeroom Teacher Role12.451.70
Stockings Clothes12.421.68
Blowjob Subject of (Sexual)21.521.67
Medium Breasts Body21.521.67
Dildo Subject of (Sexual)12.381.65
Confinement Engages in12.371.65
Serious Personality21.491.63
Ignorant Personality12.351.63
Gakuran Clothes12.331.62
Pissing Engages in (Sexual)21.461.61
Dishonest Personality12.321.61
Spoiled Personality12.321.61
Clamps (BDSM) Subject of (Sexual)12.321.61
Smart Personality21.461.60
Bondage Sex Engages in (Sexual)12.271.58
Swimsuit Clothes12.271.57
Jacket Clothes21.421.56
Knife Items12.241.55
Cautious Personality12.201.53
Kidnapping Engages in12.201.53
Talkative Personality12.161.50
Flustered Personality12.131.47
Stubble Hair12.121.47
Suspension Bondage Subject of (Sexual)12.111.46
School Uniform Clothes60.751.46
Violent Personality12.101.46
Short Body12.071.43
Brave Personality12.051.42
Uniform Clothes12.021.40
Nipple Teasing Engages in (Sexual)12.021.40
Belt Clothes21.271.40
Towel Clothes12.011.40
Secretive Personality12.001.39
Watashi Personality21.261.38
Childhood Friend Role21.261.38
Tomboy Personality11.961.36
High Heeled Shoes Clothes11.961.36
Selfish Personality11.961.36
Long Hair50.751.35
Friendly Personality21.221.34
One Piece Swimsuit Clothes11.921.33
Villain Role11.901.32
Rude Personality11.871.30
Bra Clothes11.871.29
Twin Braids Hair11.861.29
Teen Body70.621.29
Investigation Engages in11.861.29
Sitting Sex Engages in (Sexual)11.831.27
Rape Engages in (Sexual)11.821.26
Big Breasts Body21.141.25
Brown Eyes30.901.25
Braid Hair11.781.24
Necktie Clothes21.111.22
Anal Sex Engages in (Sexual)11.761.22
Handjob Subject of (Sexual)11.751.22
Deredere Personality11.741.21
Missionary Engages in (Sexual)11.741.21
Outgoing Personality11.741.20
Panties Clothes11.731.20
Older Brother Role11.731.20
Cowgirl Engages in (Sexual)11.721.19
Reserved Personality11.721.19
Nipple Sucking Engages in (Sexual)11.701.18
Arrogant Personality11.701.18
Stoic Personality11.701.18
Mysterious Personality11.691.17
Doggy Style Engages in (Sexual)11.691.17
Carefree Personality11.681.16
Pervert Personality11.631.13
Nail Polish Body11.631.13
Kind Personality21.031.13
Vaginal Fingering Engages in (Sexual)11.621.12
Grey Eyes11.601.11
Brown Hair40.681.10
Spiky Bangs Hair21.001.10
Ore Personality11.581.09
Nipple Teasing Subject of (Sexual)11.571.09
Jeans Clothes11.561.08
Older Sister Role11.561.08
Cunnilingus Engages in (Sexual)11.551.08
Girlfriend Role11.541.07
Refined Personality11.541.07
Makeup Body11.541.07
Energetic Personality11.521.05
Straight Hair20.951.04
Necklace Clothes11.501.04
Slim Body50.581.03
Shoulder-length Hair20.921.01
Pantyhose Clothes11.420.99
Not a Virgin Role11.420.99
Tank Top Clothes11.420.98
V Bangs Hair11.410.98
Nipple Sucking Subject of (Sexual)11.380.96
Hosome Eyes11.370.95
Wavy Hair11.360.94
Adult Body11.350.93
Pink Hair11.330.92
Red Hair11.320.92
Curtained Hair11.300.90
Black Hair20.810.88
Blue Eyes20.800.88
Pale Body90.370.85
Blowjob Engages in (Sexual)20.760.84
Blue Hair11.190.83
Ribbon Hair Tie Clothes11.190.83
Cunnilingus Subject of (Sexual)11.160.81
Handjob Engages in (Sexual)11.160.80
Missionary Subject of (Sexual)11.120.77
Glasses Clothes11.080.75
Vaginal Fingering Subject of (Sexual)11.080.75
Sitting Sex Subject of (Sexual)11.060.74
Parted to Side Hair11.050.73
Amber Eyes11.030.71
Green Eyes11.020.70
Sidehair Hair10.980.68
Short Hair20.610.67
Cowgirl Subject of (Sexual)10.950.66
Doggy Style Subject of (Sexual)10.930.64
Blond Hair10.890.62
Virgin Sex Engages in (Sexual)10.850.59
Young-adult Body10.760.53