Do you want your own harem? How about in another world for some reason?
Upon dying you are greeted by Voluptas, Goddess of Lust, and give the power of size control.
You use this power in the only possible way, to change the breast size of any girl you're intimate with.​

A Survival Horror Game of Temptation and Transformation
The world has fallen to the RAG-Virus—a pandemic causing rapid weight gain and mental decline. You're Sarah, alone in your apartment as Visitors knock each night. Some are survivors. Others are something far worse. Every choice determines if you survive or become their next mindless vessel.​

Features:
Visitor Testing System: Check hands and teeth—some aren't human
Weight Gain Progression: Watch Sarah physically transform as the virus takes hold
8 Unique Visitors: Each with their own dark desires and secrets
Multiple Endings: Survive, escape, or embrace transformation
Psychological Horror: The seductive pull of giving in
Content Includes:
Female MC transformation
BBW/SSBBW weight gain
Breast and ass expansion
Horror and psychological tension
Adult themes (18+)

From the Developer
"Don't Open the Door explores the intersection of fear and desire. What happens when the thing that terrifies you also tempts you? When survival means resisting pleasures that promise to erase all your pain? This game is about that moment of choice—when the knocking starts, and you have to decide who to let in."

Office was dead quiet when I opened this in a side tab, pretending to be “checking Tableau dashboards”. Yeah, sure. This is not a numbers game, unless you count cup sizes like I do. The whole thing spins around this girl, Luna, who starts off feeling pretty average, kind of lost in routine. Nothing special on paper, basic student life, but the fun part is how quickly her “normal” becomes totally fucked in the best way once she finds that weird little shop. It feels like someone mashed a comfy slice‑of‑life VN with a horny growth spreadsheet, then forgot to clean up the formulas. You click through dialogue like usual, but every potion choice is basically a data point in a very perverted line chart. Tits go up, ass goes wide, clothes stop respecting physics, and you keep thinking “ok, that’s enough” then push one more increment anyway.

What I liked is how slow the ramp is at the start. The first time her bra feels tight, it’s described so plain and small that my analytics brain instantly went “ah, baseline shift detected”. Then suddenly she leans over her desk, button strains a bit, roommate notices something is off, and you realise, oh, we’re actually doing a full time series here, not just one jump cut. It’s a visual novel, sure, but it feels like a growth sim hiding in VN clothes. You pick ingredients from the shop that sound half harmless, half cursed, mix them up, and there’s this little thrill when you click to the next scene like you’re refreshing a dashboard after changing filters. Some routes keep it modest for a while, like she’s just getting a bit more curvy, more confident, still fitting in public transport seats. Other times, if you go greedy with the recipes, she turns into walking fanservice and the story doesn’t even pretend to be realistic anymore. Which is fine. We’re already in “magic boob lab” territory.

I got irrationally annoyed by one tiny thing though: sometimes the dialogue repeats her surprise again and again, even after you already boosted her three times with the same potion. Girl, you watched your ass grow out of two pairs of jeans already, you are not “confused” anymore, you are running A/B tests on your own body. At least it feels that way. Still, there is this nice, guilty pleasure vibe when she looks at herself in the mirror and you can tell she is half scared, half turned on. That kind of scene hits harder than the big “wow huge now” moment for me. Also, the game quietly tracks your choices in the background like some horny analyst, feeding you different little reactions depending what path you push her toward. I kept thinking of it like a perversion funnel: start with mild curiosity, end with her filling doorframes and pretending this is still a normal student life. And yeah, I know I should have been doing pivot tables in Google Sheets instead of watching a fictional girl outgrow every outfit she owns, but honestly, watching those curves “trend upward” felt more satisfying than any quarterly growth report I ever made.

Gwen feels like that girl you see on Instagram explore page at 2 in the morning, the one who starts normal and then each post she’s suddenly thicker, stronger, tits a bit bigger, smile a bit cockier, and you’re not sure when it stopped being “fitness progress” and turned into “okay this is fetish now”. The game basically leans fully into that slide. You pick if she’s a regular girl or packing extra, and then the whole thing is just following her around while she chases this obsession with becoming more. More muscle, more height, more boob, more everything. And unlike the usual clickbait, here it actually happens. You start off with this pretty cute, kinda nerdy Gwen and then a few scenes later she’s filling her top and low key flexing in every line of dialog like she just discovered r/girlswithmuscle and decided that’s her life path. The writing is light, horny and a bit awkward sometimes, which honestly fits. It feels like reading horny Discord logs someone polished a little, not some corporate porn script. She’s curious, pushy, gets turned on by her own reflection, and every time the game gives you a choice you know you’re going to pick the one that makes her bigger and you pretend you’re thinking about it, but you’re not.

What makes it a bit different from other visual novels like Being a DIK or all those Ren’Py clones you grab off itch is how shameless it is about the growth stuff. This is not “oh she just got a cup size up, wow”. There are moments where you watch her wake up, realize her tits are not only heavier but resting on her own abs that didn’t exist yesterday, and she just starts squeezing them and describing how the nipples feel too tight for the bra you literally saw her buy one scene ago. Or there’s a branch where she’s already fairly buff, like early crossfit influencer level, and a random encounter spirals into her getting off on lifting someone smaller, pinning them casually because she’s stronger now, then using that rush to push herself into another transformation. The muscles are not just a tag, they get fetish attention: veins, hardness, how her thighs start rubbing when she walks and she pretends she hates it. Then two clicks later she’s doing squats in front of a mirror, talking about how hot it is that her ass is swallowing the shorts. Sometimes it goes too fast, honestly. There are scenes where she jumps from “cute girl in a hoodie” to “amazon with breasts like overfilled balloons and a growing belly from all the weight gain kink stuff” in the space of a few dialogs and you wish the game slowed down a bit, made you earn each size jump more than just picking the obvious horny option. Also the AI generated art has those moments where a hand looks a bit cursed or a boob curve is… confusing, and it pulls you out for a second, like when Stable Diffusion forgets humans don’t have 3 shoulders. But then the next scene hits with Gwen trying on clothes that used to fit, popping buttons across her chest, laughing in that cocky “oh no, I’m just too big now” way, and you forget you were annoyed. It’s trashy, horny, kind of self aware, and the whole “bigger in every way” idea gets pushed way further than you expect on a random browser tab between Pornhub and Reddit.

City girl, new campus, way too many cute women who really like dessert and bad decisions. That is the basic vibe here, except it gets kinky fast. You are this tiny thing from a small town, trying to be serious student, then suddenly you are in a dorm kitchen at midnight watching a shy bookworm slowly destroy a whole cheesecake because you told her she “deserves to relax a bit.” Her shirt is struggling, her belly is peeking out, and the game just lets you sit with it. Not in a hurry. You get those little pixel animations of her chewing, swallowing, then that tiny pause when she leans back and realizes, oh shit, her bra hooks are losing the war. And somehow it feels almost wholesome and also horny as hell at same time, which is very confusing in the best way.

What surprised me is how much of the kink is in the small choices. Like, it is not just “click here for bigger boobs.” You are picking stuff like “invite her for coffee” or “suggest dessert place one more block away” and it snowballs. Literally. One girl starts as this gym-obsessed queen who lectures you about macros. Couple of late-night study sessions, you keep nudging her toward snacks “just for energy,” and a few scenes later she is huffing while climbing stairs, pretending everything is fine, while her ass is pulling attention away from the whole campus. The writing is pretty simple, sometimes a bit clumsy, but it hits those little insecure lines that feel very real, like when she makes a joke about her jeans “shrinking in the wash” and you know she does care, but also she secretly likes how you stare. Some of the dialogue lands awkward as fuck, like a bad Tinder chat, yet I kind of loved that too. It fits the messy vibe of horny students who do not know what they want and still push for more cake.

The pacing is all over the place in a very human way. One date event takes forever, with you watching this artsy girl slowly unbutton her cardigan as her chest refuses to stay contained, her sprite updating just slightly each time you meet again, until suddenly she is buying clothes in a bigger size and pretending it is “just the style.” Then another route jumps from slim to “wow ok she is knocking stuff off the table with her tits now” in two scenes, like the game forgot to breathe. There is a tiny thing that annoyed me: the text box sometimes covers the best part of the sprite and I kept trying to drag it like in Ren’Py, except you cannot, so I just sat there grumbling at my screen like an idiot. On the other hand the pixel art has this lazy charm, not super polished, not trying to be Instagram-perfect. A little rough line here, a weird angle there, but the curves look heavy, soft, and you can almost feel the extra weight on their hips when they turn. Watching the girls change outfit to outfit, seeing how every skirt, every top stretches a bit more, becomes the real reward. If you want to squeeze the most juice from it, slow down, pick the indulgent options even when they look minor, re-visit scenes to catch the new details on their bodies, and let yourself enjoy every bite, every button popping, every moment where a girl pretends she is not turned on by the fact she cannot see her feet as well as before.

You start with this half-dead hotel that looks like it smells of cheap cleaner and old sex, and somehow it becomes this weird little universe where every floor has a different flavor of horny drama. It looks like a normal dating sim at first, like “oh yeah, I’ll just talk to the girls, raise some stats, classic stuff”, and then three scenes later you’re holding a trembling elf maid by the hips while she tries to act all proper and obedient and ends up squirting all over the new bedsheets you saved up to buy. And you’re thinking: ok, I just wanted romance, why is there a menu option for nipple clothespins in the housekeeping budget. But you still click it.

The hotel thing works too well. Everyone is under your roof, so you bump into them doing absolutely everything. You go into a hallway thinking you’re just going to check repairs, and you catch one girl “cleaning” a window with her tits pressed against the glass, tongue out, full ahegao, while someone down in the street could totally see her. It counts as voyeur and exhib stuff at the same time and the game doesn’t even wink at you, it just lets it happen, like yeah, this is just Tuesday here. You can be the pure romance guy and still the world keeps trying to corrupt you. There’s a religious girl praying in one scene, acting shy like a virgin, and later you’re there timing her orgasm denial with your phone while she begs for just one more thrust and you’re like, ok, maybe I’m not “pure” anymore. I kept telling myself I’m avoiding the nastier paths, and two minutes later I’m watching a lactation event where I was only trying to give comfort and suddenly there’s warm milk and a helpless girl calling you “master” in this shaky voice. Total accident. Kind of.

What really got me is how your role shifts without a big “you are a trainer now” sign. One moment you’re like a soft-spoken manager who buys cute maid outfits and simple cosplay ears, the next you’re running what is basically a private bdsm spa on the top floor, where you decide who gets the collar and who just gets spanked until their ass is bright red and they can’t sit in the café. Some girls push you around too, it’s not just male dom. There’s a yandere type that goes from clingy to “if you fuck anyone else I’ll break their legs” energy, and she rides you so hard you legit feel like the slave instead of the trainer. Then later the same night another girl kneels down in the lobby and gives you a slow, careful blowjob like it’s a love letter, and you remember why you came here for romance at all. But then there’s some fucked up family route on the side, anal stuff mixed with “we shouldn’t do this” whispers, a footjob in the laundry room, a titfuck in the elevator when the doors keep almost opening, group sex in a suite where everyone’s moaning your name at once, and somewhere in the middle of that mess you’re still checking income stats on your phone and thinking about upgrade costs like an idiot. The hotel keeps growing, the harem keeps getting bigger, some girls get their breasts reduced while others suddenly swell up like a fantasy elf breeding project, and you’re walking around your own building knowing exactly which room has a girl quietly masturbating, which one hides a camera for your voyeur habit, and which bed has fresh cum drying in the sheets because you didn’t even bother with pulling out after that last creampie. It’s romantic in the trashiest way, and trashy in a way that somehow still feels kind of sweet.

You wander into this little bar scene, kind of basic at first glance, and there she is at the counter: this cute girl who looks familiar in a way that itches at the back of your brain. Not some overdesigned hentai goddess, more like that one girl you always notice in the same Discord server, then suddenly realize you’ve seen her avatar everywhere. She’s clearly bothered by something, kind of lost in her own head, and the whole game basically pushes you into that “ok, I’m gonna talk to her or I’ll regret it forever” moment. From there it turns into this weirdly comfy mix of small talk, teasing, and slowly turning everything way hornier than it has any right to be. At the start her body looks pretty normal, on the busty side but nothing insane, and you’re just chatting, picking options, trying not to sound like a total creep. Then week by week, your little bar hangouts shift from “hey, how was your day” to “wait, were her tits that big last time?” and your brain is trying to focus on her problems, but your eyes are just screaming. Her chest swells, her ass fills out, clothes start losing their battle. The game kind of leans into that “oh god, it’s still growing” energy, and if you are into that, yeah, it absolutely scratches it.

There is this nice bullshit-free quality to it. No 40 systems stacked on top of each other like a gacha hell; you just go on weekly meets, watch her body change, nudge her personality, flirt harder, hit those horny choices and slowly push things from shy bar conversations to straight-up filthy stuff. One minute you are comforting her about how weird her body feels, next minute you’re watching her squeeze her own tits that clearly do not fit in that top anymore, and the writing does not shy away from the messy parts. There is cum, there is rougher stuff once you get her there, and when you finally push it to sex, it is not some gentle lovey dovey thing, it’s very “I’ve been staring at these massive boobs and ass for weeks and now I’m just going to fuck you like I mean it.” When the release hits, the game actually lets it feel heavy and sticky, like you painted her with it, instead of just one lame little line of text. But yeah, it is short. Like, almost annoyingly short right now. You get into the groove, her curves finally go from “big” to “cartoonishly huge” and then scene, credits, thanks for playing. Some choices feel like they will matter a lot more than they actually do, and you can kind of tell this is early build stuff. I kept waiting for her wardrobe to react more to the body changes too, not just “slightly tighter version of same outfit”, but the game never fully goes wild with that yet and it lowkey bugs me more than it should. Still, for something this new and unpolished, the pacing of the growth is weirdly addictive, like checking the same subreddit every day just to see if someone posted new expansion art. It’s raunchy, it’s clumsy, it knows exactly what fetish it wants to feed, and it doesn’t pretend to be anything deeper. You meet a troubled girl at a bar, watch her tits and ass blow up over time, talk her through it, then absolutely ruin her with sex. Honestly, that’s the whole charm.

Game starts in that weird way where everything looks kind of normal, but all the camera angles are already staring at tits and asses like they’re setting up a punchline. You pick if you’re a guy or futa and it changes the vibe more than I expected. As futa, the dialogue reads a bit different, more teasing, like the game knows you’re walking around with a weapon between your legs. As a dude, it leans harder into that “overwhelmed but horny anyway” fantasy. Either way, you’re thrown into a world where some women are just… wrong size. Not tall like a model. Big like your line of sight turns into one huge ass cheek and a nipple casting a shadow on the pavement. And the game doesn’t even pretend to be subtle. You talk, you click, someone’s shirt is too tight, it rips, you see breasts that are clearly violating physics and probably human rights. And it just keeps escalating.

What I like is how it mixes the giant girls with personal, close contact stuff. One scene you’re basically a toy, stuck between a milf’s thighs while she casually chats like it’s no big deal you’re pressed against her soaked panties. Then later you end up in a more classic bedroom moment with a stacked mature woman who pretends this is a normal date, until her tits start swelling mid foreplay and suddenly you’re trying to titfuck her and the game has to zoom out because each breast is like a separate horizon. The dev clearly gets the fetish side: huge asses swinging when they walk, nipples leaking milk during conversations, a girl absentmindedly masturbating with you watching from her palm like it’s a TikTok live. There’s a really stupid and also perfect scene where you slip while climbing a giantess and faceplant straight into her asshole area and the game just treats it like a “whoops, anyway” moment. And yeah, there’s harem energy all over. Different personalities, but same general rule: they want you inside them, around them, under them, or coated in something. Creampies are everywhere, sometimes regular, sometimes on a scale where your whole body is just part of the mess. It can be oddly sweet then instantly filthy. Sometimes in the same line of dialogue. It annoyed me that the phone UI in one scene looks like some cheap early Android app and they never use it again for any cool mechanic. I kept expecting it to matter. It doesn’t.

Transformation parts hit different, too. You’re not just watching the girls change size. There are moments where a normal girl you’ve been teasing suddenly balloons in the right places during a makeout session, ass stretching her panties, boobs swelling until the straps dig into her skin, her moaning not only from pleasure but from feeling herself literally grow around your hands. One route flips it and lets you pick futa, and then the power balance changes because now your cock can actually keep up with some of these giant holes. There’s this nice absurd contrast where one milf cradles you like a doll, stroking your hair, then lowers you toward her pussy and it’s just this dripping cave that you’re supposed to “fill” somehow. You can, kind of, but the game knows it’s ridiculous and leans into it, with angles straight out of a size-fetish discord channel. Vaginal sex scenes range from soft and slow to “she sits down and you basically disappear in folds of wet flesh.” The lactation stuff is heavy. Not just a small drip, more like a girl jerks herself off with one hand and squeezes her huge breast with the other, spraying over you while you jerk or finger her, and there’s a bit where you actually hump her boob while it’s leaking and it’s both messy and stupid in the best porn way. They even sneak in masturbation segments where you’re not touching anyone, just watching these giant bodies and jerking off while the game teases you with closeups of thighs, lips, and that moment right before penetration. Things aren’t perfect, some dialogue sounds like it was half written on a phone while the dev was horny and distracted, but it kind of fits. It feels less like a polished porn movie and more like you stumbled into someone’s very specific collection of fantasies, stacked on top of each other until the screen can barely hold them.

Tifa walks into this one already pissed off at the world, and honestly, it fits. She’s strapped up in this weird industrial “milk plant” setup again, but this time there’s no fancy machine, no sci‑fi vacuum cups, nothing high tech. Just rope. Thin, mean looking rope that you wind around those huge tits like you’re tying up luggage on top of a car. The whole thing feels nasty and personal, like someone looked at the old milking rig and said, “nah, too kind,” then went for the cruelest low budget option. You see her squirm against the bindings, arms stuck, chest pushed out more than it already is, that annoyed glare that says she’d punch you through a wall if she could move even one hand. Her breasts are already swollen and shiny, veins a bit visible, like the milk is begging to get out long before you start doing anything. The vibe is somewhere between dungeon and dairy farm, and she really, really fucking hates the “cow” angle, which of course makes the whole scenario lean harder into it.

The rope pressing into the soft flesh is the whole show here. You’re not just clicking a button and watching a canned animation play; it actually feels like you’re working those “milk balloons” on purpose. You tighten the line, shift it higher, lower, cross it over the nipples, squeeze the base to force everything forward, and suddenly she’s spurting like someone opened a valve. The white streaks run down her underboob and drip from the tips, pooling under her like she’s been stuck there for hours. She gasps or growls depending on where you press, little mix of pain and unwanted pleasure, that classic “don’t fucking enjoy this, body” moment. There’s this one bit where you twist the rope just right so it digs into the areola while you push the whole breast up from below, and she arches her back so far you half expect the rope to snap. It never does. You can push and squeeze and grind your fingers in like you’re kneading dough made of tits, and the game just keeps rewarding you with thicker streams of milk and more desperate facial expressions. It’s not subtle. It’s not romantic. It’s someone treating Tifa like a piece of meat on a hook and getting off on how helpless she looks in latex and string.

Compared to a lot of softer “big boob” stuff floating around on Nutaku or random itch.io kink projects, this one feels more like those trashy old hentai clips you got off LimeWire where poor Tifa is always the target. There’s no pretense about cuddling or dating, it’s just restraint, pressure, and liquid. You’re basically a perverted plant worker who cares about output, not her comfort. She’s gagged sometimes, sometimes not, but either way her mouth is useless since all the focus is down on those massive, abused tits. The rope is almost like a character itself; you learn how it bites into skin, how far you can tighten before the boobs deform in that exaggerated hentai way, how a little extra pull suddenly makes the nipples fire a high‑pressure jet instead of a slow leak. It’s actually kind of funny how much milk comes out, like her chest forgot it was attached to a human and decided to be two insane milk tanks instead. The whole “Final Fantasy main girl as cow” fetish is front and center, and the game doesn’t pretend it’s anything else. If you’re into rope, into seeing a strong woman turned into a tied up milk source, into that fucked up mix of humiliation and forced milking, this hits that exact nerve, no fluff, no story excuses, just rope digging into soft flesh and Tifa glaring while her tits betray her over and over.