Screenshots
About Into the Monster Girl Hole
Into the Monster Girl Hole Overview
Into the Monster Girl Hole drops an ordinary man into a world unlike his own: a realm without males, sustained entirely by the attention only he can provide. Built in Ren'Py by developer Calabi-Yo-Manifold, this is a text-driven adventure that leans on prose and imagination rather than heavy visual spectacle, using 2D backgrounds to set the scene while the narration carries the weight of each encounter.
The setting blends fantasy and science fiction, as the protagonist finds himself the sole source of fulfillment for a population of monster girls, including mature and motherly types, who have no shortage of interest in him. As he explores this strange parallel existence, choices and interactions shape relationships that range from playful to deeply intimate, with pregnancy among the themes the story is willing to explore.
Currently sitting at version 0.2.4, the project is under active development, with more content planned beyond its present scope. It runs on Windows and Linux, is presented entirely in English, and is aimed at players who enjoy reading-focused adult fiction built around a male protagonist navigating a world shaped entirely around him. After the Fall
Into the Monster Girl Hole is an adult game developed by Calabi-Yo-Manifold built with the Ren'Py engine. It is currently in active (ongoing) development, at version 0.2.4. You can download and play it on Windows and Linux. It falls under the Adventure, Text Based, 2DCG and Male Protagonist genres. It was first released in 2026.
Download Into the Monster Girl Hole
Version 0.2.4 · pick your platform, then any mirror
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Enjoying Into the Monster Girl Hole? Support Calabi-Yo-Manifold so they keep making it.
Support on PatreonHow to Install
- Extract and run.
Guides & extras
Community-made · external linksVersion history
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LATEST 2 changes- Spoiler
- 7 new monster chicas
- crazy-ass, difficult puzzle (walkthrough is your friend if needed)
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5 changes- Spoiler
- 23 new monster girls
- New Mili and Ilim scenes
- HUGE lore progression
- A hypermetric fuckton of new content (like, 3 updates-worth of it)
- Free roam2 new achievements
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5 changes- Spoiler
- 9 new monster girls
- 3 new subspecies
- fun puzzles
- 1 new achievement
- Mili, Chaaya, and Vruće have been reworked
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2 changes- Spoiler
- 8 new gals
- 3 new achievements
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3 changes- Spoiler
- 2 new monster girls
- Mili's, Ilim's, Sweety's, Chaaya's, and Marissa's pics have been updated, as well as their scenes and the intro of the game (no story changes, you don't have to replay them)
- Looooooooore
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3 changes- Spoiler
- 25 new monster girls
- Massive lore drops
- 3 new achievements
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4 changes- Spoiler
- I have no idea how to even count the amount of new monster girls... It's between 28 and 34, depending on which way you count
- Overhauled Devil species descriptions
- I removed the 'lesser devils' subspecies and added the 'chimeras' one
- Some of the serious/disturbing/depressing scenes have been dialed back a bit
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3 changes- Spoiler
- 13 new monster girls
- a new species: Shapeshifters (with its respective subspecies, them being beastkin, birdkin, insectkin, kitsune, medusas, and merfolk)
- a few bugfixes
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3 changes- Spoiler
- 12 new monster girls, plus a few returning faces
- 2 new species with their respective subspecies, and 2 new subspecies for existing species
- 1 new achievement, and you'll know where it is
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4 changes- Spoiler
- 13 new gals
- slight file size reduction (I could've reduced it even more but at the expense of MG pic quality. For now, I don't want to do that)
- Cool puzzles... Maybe. You'll be the judge
- The scene replay for MGs shouldn't be able to break anything anymore now
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6 changes- Spoiler
- 1) I've added one line of code to the beginning of the game which, of course, people with a save file won't be able to see so I'll copy-paste the exact message here:
- "WARNING: This game may contain disturbing and/or depressing scenes/images as well as graphic violence. Also, general trigger warning just in case. If you cannot handle that, stop right here."
- 2) I've started to notice more and more errors in the code when it comes to handling variables and the catalogue scene replays as well as other problems there. I'll just issue a careful warning not to save the game DURING or AFTER a replay, just in case. Sadly, in order to fix these things how I would want them to be fixed would change the code so drastically that your save files would become unusable, which is something I will try to avoid at all cost. I don't know if one can actually break a save through scene replays but I wanted to mention it anyways. Who knows, maybe someone out there wants to abuse this to get some funny results
- 18 new monster girls, including one main character and one... Secondary main character? Is that how you say it?
- A shitload of new content, the most since the initial version of the game
- Plenty of minigames/puzzles etc., I even thought of and implemented an entire card game that you can play (not really a fair one though)
- 3 new achievements, evil as always
- Funky new soundtracks (since the update is so long, I created multiple because I didn't want people to get sick of them)
- Some bug fixes... I think. As always, I didn't write down what I fixed and forgot
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5 changes- Spoiler
- Mili has new dialogue images to match her picture
- Ilim has a new look, now she looks like I imagined her
- All existing scenes have been altered and received some 'upgrades'. In this regard, please check out the infopost
- Continuation of the story with 6 new monster girls... Or was it seven?
- Some minor fixes
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9 changes- Spoiler
- New content:
- New monster girls: 12
- Xray panels for a more immersive sexytime experience (I repeat though, don't expect too much from them. Making them requires a lot of manual editing which I SUCK at, but I think they serve their purpose)
- Sexytime scenes now have sound
- They ALSO have cum overlays now
- This update is free roam, so have fun exploring
- 2 new achievements
- Changes:
- I wasn't happy with the robots species, as the most robotic subspecies (robot girls) weren't 'robotey' enough for me, so I added a new subspecies: true robots! They are as close to actual robots as you can get. With this, a bit of dialogue has been changed from the previous update.
- I also wasn't happy with Py-Thon's non-ahegao dialogue images, so I overhauled all of them.
- ........ I also wrote down a note that I changed something regarding the clarification of the rules of creation, but I don't understand what I meant there lol. Oy vey, what a developer you have here...
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3 changes- Spoiler
- New monster girls: 12 (of which 5 have only been introduced, they don't have any scenes yet)
- Changes: None (I think)
- New stuff: Alright, this is the big one: I have mentioned this in a progress update already, so here it is again: We'll be having X-ray penetration panels from now on! Woooo ! They may not be perfect, but they are good enough for me, and that is what counts for me. I'll have them for sexual acts that are not easily apparent from the monster girl image, so no pics of titfucks, bjs, handjobs, etc. (unless they are NOT easily apparent). Sex, anal, and everything that is hard to imagine from looking at the image will have them though. One girl in this update will have such a pseudo-animated sex panel already, but every encounter going forward will have them, as well, as long as the conditions are fulfilled. Existing encounters will get them eventually, as well.
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10 changes- Spoiler
- New Content:
- 8 new monster girls
- Changes:
- added a new feature: Premonition Mode! When activated, it will display possible fetishes before every encounter. You can activate it at the start of the game.
- IMPORTANT NOTE: If you come from 0.1 and already have a save file but want to activate this mode, do this while in your save file:
- SHIFT + O --> copy and paste the following: premonition_mode = True --> press enter --> press ESC
- I've overhauled the catalogue, now text is bigger and should be easier on the eyes
- All hideous black infoboxes (that you actually could scroll out of, lol) have been kicked out and replaced with dedicated screens. This includes all info boxes in the catalogue and in the item menu
- The meme onslaught was a bit too much even for my taste and has been turned down a bit (I've also slightly changed 0.1.1 scenes in that regard, but not by much)
- humor has been either reduced or axed from sexytime scenes, as this is where players should fap, not laugh
- Some bugfixes
- Small changes:
- a small notification has been added to the catalogue when you first open it, pointing players to the 'sort by biome' option
- the volume of the frostmare hound's roar has been reduced
- Chaaya's assistant has been renamed from M-ARCY to Enco-Deco (the reason for this might become clear next update)
- some more slight changes that I've forgotten about because I am an idiot and didn't write them down as I implemented them -sigh-
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1 change- Initial Release
Reviews
Frequently Asked Questions
How can I support the developer of Into the Monster Girl Hole?
Into the Monster Girl Hole is made by Calabi-Yo-Manifold. Their official page has the latest news, builds and ways to support the project.
What platforms does Into the Monster Girl Hole support?
Into the Monster Girl Hole can be downloaded for Windows and Linux on LustFever.
Does Into the Monster Girl Hole have an Android version?
No, Into the Monster Girl Hole does not currently have an Android build — it is available for Windows and Linux.
What engine is Into the Monster Girl Hole built with?
Into the Monster Girl Hole is built with the Ren'Py engine.
Is Into the Monster Girl Hole completed?
No, Into the Monster Girl Hole is still in active development (ongoing). New versions are released over time, and LustFever keeps it updated to the latest one.
What is the latest version of Into the Monster Girl Hole?
The latest version of Into the Monster Girl Hole on LustFever is v0.2.4.
Who developed Into the Monster Girl Hole?
Into the Monster Girl Hole was developed by Calabi-Yo-Manifold.
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