"A pixel-art, perfectly-H Resident Evil", 'nuff said. The graphics are beautiful (both characters and backgrounds), the animations are smooth, and the game-over CGs are nice (bonus points for having every single game-over scene animated). There are a few areas, which differ from each other, so content-wise the game doesn't get annoying. What makes it special though is that the H-content is much more than what you frequently get in the games like this (e.g. something that feels modded-in, even out-of-place at times). Not only every monster can be interacted with, but also it all has both uses and consequences, say when engaging in combat is dangerous one can just start an H-scene instead, which, however, may cause... well, I'd call it "an extra enemy spawn", you'll see
Sometimes it may go as far as even unlocking a new area with one's own gameplay style. There is usually no penalty for triggering the scenes (and failing the classic button-mash sequences), so if you want to turn the MC into a cumdump you are free to do it (and there are the corresponding stats to see how well it went, as well as some gameplay changes it causes - so yes, there are actually two intended ways of completing the game). Story-wise, though... Well, there doesn't seem to be any actual story, we just start at a school restroom in the middle of a mutant apocalypse, make it to the cute military, blast a fat boss into gibs and reach for the safety - and that is it, no "lore" (do you even need one here though?) or any other info on what is going on (though, again, do you need anything other than "horny zombies and mutants + assault rifle", easy math?). Probably the overall length of the gameplay may be considered somewhat short, but, again, I doubt it would be worth lengthening it for no reason (as content-wise it is already great even for a much longer game).