First time I booted this thing up, my laptop fan went absolutely nuts, like it knew what kind of filth I was about to witness. I laughed so hard I almost spilled my instant ramen, which would’ve been tragic because I was starving and broke back then. Anyway, this Ren’Py thing - honestly, I didn’t expect much. I thought it’d crash after the opening screen, but then Mitsuri showed up with that ridiculous pink-green hair and that voice that’s half sugar, half “I could ruin your life.” I swear I forgot this was fan-made for a sec. There’s this weird comfort in seeing familiar faces from Demon Slayer in a totally different vibe - like seeing your high school crush at a bar years later, drunk and suddenly way too friendly.

The writing’s uneven, but that’s kinda the charm. One moment you’re reading this sweet, shy dialogue with Aoi, and the next, she’s saying something that makes you check if your door is locked. I remember playing on my old ThinkPad, lights off, window open, the neighbor’s dog barking while Shinobu’s scene started - real mood killer, but I didn’t stop. The transitions are clunky sometimes; like, the story jumps without warning, but then, who cares when Nezuko’s sitting there giving you that look. The guy who coded the affection system probably gave up halfway through, but somehow it works better that way. It’s messy, human.

What I didn’t expect was how nostalgic it made me feel. Not just for the anime, but for those early days when I’d sit up late clicking through janky visual novels on Itch.io, hoping my antivirus wouldn’t freak out. It’s pervy, sure, but also weirdly sincere - like it’s not pretending to be anything more than horny fan service stitched together by someone who actually liked these characters once. I got annoyed at the save menu though, it freezes if you click too fast. Never fixed that. I guess I could’ve looked for a patch, but nah. There’s something honest about a game that stays broken in the same spot every time you play.

Your quiet little life with mom and your cute, clingy sister shatters in one night. Blood on the floor, broken door, mom dragged off by demons like she was nothing, and your sister… yeah. She doesn’t just turn into a demon. She turns into the kind of demon that makes your brain short circuit and your pants painfully tight at the same time. Her eyes glow, her body changes, she presses close and you’re supposed to think only about saving your family, but all you can think about is how wrong it feels that it actually turns you on. This game leans into that. It doesn’t pretend you’re a saint. It laughs in your face and pushes all those incest, corruption and demon fuck fantasies you keep pretending you don’t have.

From there it’s you, a wooden sword, and a pile of horny problems. You train, you flirt, you get beaten up by demons that either want to kill you or ride you or both. The story follows your climb from useless guy who can barely swing a blade to someone who can slice up monsters and still have enough stamina to pin a horny demon girl to the ground. Sometimes literally. You run into familiar faces, twisted in fun ways: the loud blond idiot who can’t stop shaking around girls yet still somehow steals scenes, the boar mask maniac who looks like he wants to fight you and fuck you at the same time, the insect-smiling beauty who talks soft while planning how to milk your body for “research.” And then there is the “doctor” type with that calm, mature vibe that makes you feel safe right before she asks you to undress for a “test.” The game likes to take every girl you know from the anime and nudge her into “what if she was horny and absolutely not safe for work” territory.

Sex here is not just a reward screen. It sneaks in during training, after fights, in weird dream sequences where your demon sister crawls over you whispering things she definitely shouldn’t know. You’ll get seduced as much as you do the seducing. One moment you’re practicing breathing techniques, next moment some busty demon pushes you against a tree and uses your “sword” as her own training tool. There are choices, but the game is pretty honest: no matter what you pick, you’re still stuck in this messy mix of lust, guilt and blood. Sometimes you try to be noble and help a girl, then end up with her moaning under you on a futon while you both pretend this is “just stress relief.” Other times you clearly aim for corruption and the game rewards you with scenes that feel like you shouldn’t be watching them in public, even on a phone. It’s not subtle, not classy, not pretending to be anything else. It throws demons, tits, knives, and moral decay into one pot and says “yeah, this is your life now.” And honestly, it kind of works too well.

You open this thing on your phone, half expecting another cheap porn clickbait, and suddenly you’re a guy who accidentally pissed off a demon and got turned into one, then yeeted back into some messed up version of the Demon Slayer era. Everyone looks familiar, but nothing is quite right. Nezuko is hotter and way more flirty than she should be, Kanao is shy but actually gets horny if you push the right buttons, Mitsuri’s tits are ridiculous even by hentai standards, and then you’ve got futa demons and MILF characters who really don’t respect personal space. It feels like you somehow matched with the whole Demon Slayer cast on Tinder and they all agreed to meet on the same night. Bad idea. Very good idea.

This isn’t just “click next, see boobs, cum, close tab.” You’re walking around in a sandbox map, chasing events, picking where to go, who to talk to, and who to piss off. You run into Shinobu and you’re thinking “ok, soft sadist vibe, let’s go,” and next second you’re stuck in this turn based fight where you’re half-hard and half-panicking because if you screw up your choices you get your ass kicked instead of getting to pin her to a tree. One minute you’re flirting with Tamayo in a calm, polite way, the next you’re getting dragged into some horny demon brawl with Susamaru who talks shit while bouncing her boobs like they’re part of the attack animation. I liked how the combat and sex both feel like trials: fail and you get punished, win and you’re rewarded with a scene that doesn’t feel copy-pasted. The game pretends to be about “good path” and “evil path” but honestly? Half the time you’re just choosing between “fuck them lovingly” or “fuck them while acting like a complete bastard.” It’s still romance though, in that trashy Pornhub comments kind of way.

The part that really got me is how everyone sort of recognizes you as this familiar guy from their world, but also not. You kinda look like a certain water boy, but not really. Giyu treats you weird, like he wants to stab you and also trusts you, and if you push into the evil route you can use that to break him a bit. There’s furry stuff popping in from nowhere, futa demons that show up when you’re already juggling a harem, and some of the Ubuyashiki family are way too bangable for people who are supposed to be background support characters. The 3D models have that “mobile porn game ad” feeling, like, sometimes the physics go a little crazy, tits clipping through clothes, and I actually love it because it feels dirty and wrong, like you opened a bootleg Demon Slayer porn app you weren’t supposed to find. One second you’re having this almost sweet scene with Aoi where she’s patching you up and blushing at your abs, and the next you’re balls deep in a demon MILF in the woods, trying to remember if you picked the “help humans” path or the “ruin everyone” path. It pretends to be about morality, but deep down it’s about seeing how far you can push these characters into your personal pervy timeline, and how much you can abuse the fact you’re not fully human anymore. Honestly feels less like a heroic journey and more like horny time travel speed dating where every route ends with someone calling you a monster while still begging for another round.

First thought when this thing loaded was basically “ok, this looks kinda jank… but I’m curious” and yeah, that sums it up. It feels like somebody really horny and slightly drunk decided to mash Demon Slayer waifus and a dating sim in one weekend, and somehow it works better than it should. You’re not grinding demons here, you’re grinding affection bars and lewd scenes, talking your way into the pants of Shinobu, Nezuko, Kanao, Mitsuri, Daki, Tamayo and a few others the dev clearly has bookmarked in his Rule34 folder. It plays like a visual novel with some light sim stuff stapled on: you click through scenes, make choices, pick where to spend time, watch numbers go up, unlock another scene where a “pure” girl suddenly rides you like she’s been training for it. Totally classy. Totally not classy at all.

What surprised me is how each girl has her own vibe, even though the game is pretty scuffed. Shinobu goes from teasing “ara ara, you’re kinda cute” into straight-up talking about how she wants to milk you until you can’t stand. Nezuko’s route leans into that quiet, needy thing: lots of blushing, sucking, licking, her climbing in your lap like a cat in heat. Kanao starts super shy, barely talking, and then there is this moment where you finally break through her coin-flip bullshit and she decides, with this tiny smile, that she’s going to “devote herself” to you. Two scenes later she’s on her knees, eyes glassy, letting you cum on her face, and the script doesn’t even pretend it’s about romance anymore. Mitsuri is just horny from the start and I respect that. She goes from “I really like strong men” to “please fuck me until I can’t walk” in like three dialog boxes. Daki is straight-up toxic, which is hot: she insults you, treats you like trash, then moans when you pull her hair and pound her so hard her demon composure breaks. Tamayo is the gentle one, but of course she ends up on a table, skirt pushed up, letting you take out “stress” on her while she tries to stay composed and fails. The whole thing swings from romantic to filthy in seconds, and it feels wrong in a fun way.

The actual game part is simple as hell. You pick spots, talk, give gifts, answer horny or sweet, watch affection rise, unlock another scene where clothes magically vanish. There’s no deep stat management, just enough clicks so it doesn’t feel like a pure gallery. Sometimes the pacing is weird: a long dialogue about feelings, then the next choice is basically “do you want to fuck her now or fuck her harder later” and of course you pick both. I liked one moment with Shinobu where you end up in a quiet room in the butterfly mansion, she’s fake-innocent, leaning closer with that smug smile, then the text hits you with her whispering what she wants you to do to her tongue, and suddenly this hentai Android game in my browser feels way dirtier than it looks. Another time with Nezuko, the CG opens and she’s bent over, drool on the floor, and the game just casually describes how she pushes her hips back, begging without words. Honestly I wish some scenes were longer, but also I don’t, because the short, punchy lewd moments keep you clicking for “just one more” like a degenerate. It’s rough, unpolished, sometimes cheesy, but when Mitsuri is bouncing on your cock, tears in her eyes, babbling about how she loves you and your “thick human cock”, you kinda forget it ever looked scuffed at all.