This thing looks like some horny fan’s side project that accidentally turned into a real time sink. You open it expecting some cheap Demon Slayer parody fap-bait and suddenly you’re squinting at the grid going “wait, if I merge this here, it frees that space… shit, I need one more level 4 barrack.” It’s that classic merge, merge, merge style, small stuff into bigger stuff, except the game keeps dangling the lewd carrot in front of your face: build the next tier of building, unlock another dirty peek inside the Demon Slayer Corps HQ. And it really leans into the “secret base” fantasy, like all the serious anime fights happened outside, while inside they’re fucking like rabbits behind closed doors. First few minutes you’re barely paying attention, sliding low-level training sheds around, merging them just to see what pops next, then suddenly you realize you’re trying to min-max some horny base layout because the next unlock says it has Nezuko in it and your brain just goes “yeah ok, I’m not stopping now.”

The art for the scenes is where the game drops the polite act. You get that first tame image, a little teasing, almost like a fanservice shot. Then it ramps. Nezuko pinned half-undressed, bamboo gag nowhere to be seen, thighs spread while some “training session” clearly got out of hand. Kanao has that blank doll face while doing things that would absolutely get her expelled from any real corps. Tanjirou, who looks so earnest in the anime, here is the guy fucking someone on top of a mission table while papers are flying around, and I swear there’s a map under his ass. You unlock one with Shinobu and it’s this perfect “soft smile, filthy mouth” combo, her legs casually open like it’s just another experiment, only now she’s testing how much cum she can take on her stomach. Half the fun is waiting to see who gets corrupted next and how far the artist will push them. The game doesn’t pretend it’s about romance or “deep bonds” either. It goes straight into rough training, handsy “medical exams”, tits squeezed under haori, panties pulled to the side in some corridor taken like it’s nothing. A lot of fan art out there is shy about actually showing penetration. This one? Nah. Full dick, wet folds, messy faces, cum strings, all that good nasty stuff. Even the backgrounds are specific enough to feel like real HQ rooms: barracks with futons tossed everywhere, storage closets with crates stacked while someone’s getting railed, a strategy room where nobody’s strategizing anything except how to fuck on the main chair.

The puzzle side is where it weirdly gets addictive. You’re not dragged through a story, it’s just that merge logic loop. Combine two low-level structures into one better building, clear space, plan your next merge, avoid clogging the board with useless low-tier crap. It’s simple, but your brain starts doing that quiet math: “Ok, if I wait for one more basic hut, I can merge three chains and hit the next unlock.” I had that one moment where I was one building short of the next scene with Kanao and I just stared at the board like an idiot, trying to find some sneaky chain I missed. And of course I hadn’t. Had to grind a bit more. That kinda annoyed me, but I kept going anyway, which pisses me off more because it means the dev knew exactly what they were doing. On the flip side, sometimes the board feels cramped and you’re fighting clutter rather than enjoying the lewd chase. There were moments where I was muttering “ok, but let me fuckin see Shinobu already” while moving another pair of ugly small huts out of the way. The pacing of unlocks is mostly nice, but once or twice it stretches that gap just a bit too long, and you notice you’re not touching your dick, you’re just playing a puzzle game about horny ghost buildings. I kind of wanted one extra little mechanic, like a risk/reward button that lets you sacrifice a half-built chain to instantly reveal a blurred teaser. Or some special HQ upgrade that gives you an alternate sex scene version of the same girl, like “normal training” vs “punishment round” or maybe a drunk late-night scene where Nezuko is sitting in Tanjirou’s lap, kimono slipping off her shoulders, his hand under the fabric while she bites his neck instead of the bamboo. The funny part is I’m pretty sure if they added more stuff I’d still complain that the merge grid is too small, even if it’s totally fine. That one stupid tiny building that never lines up where you want it? I hate it. I still merged it, though. And yeah, the morning after I mostly remembered one scene of Shinobu kneeling in front of a low table in HQ, haori sliding down, lips open, cum dripping on the tatami, while the game gently popped up a tiny “new building ready” icon in the corner like it’s just business as usual.