Often a developer will release a demo of a third person adult game and it just feels horribly incomplete. There is a reason people prefer to wait until we have gone numerous releases into a project, especially since getting invested early tends to end in disappointment. Many Ends doesn't really fall into these pitfalls, instead featuring a mostly complete experience. Music, skippable cutscenes, fluid controls, a lot of the basics are there. It is very possible to forget that this is a demo; this does not feel like your general RPG maker game with placeholders crammed in every corner.
This isn't the first 3rd person adult shooter. This is one of the first I have seen that focuses on waves instead of trying to tell some story. While some might be turned away by the lack of complexity outside of "zombie see girl, zombie try to rape girl", it manages to offer a surprising amount of replayability. There is a gallery with very simple scenes, but the real meat of this game is jumping right in to a combat simulator with a female protagonist trying to avoid being raped. While the run or rape genre might have been prevalent a decade ago, it has quieted mostly outside of Japan, and thus seeing a game like this is quite welcoming. Other adult third person shooters (my preferred genre as I hate relying on stats over player ability) often suffer from a lack of replay value; once you know the location of each enemy, it begins to feel like rote memorization. You never really get that issue here, making this one of my favorite adult games.
Unlike other reviews so far, I haven't given this five stars, mainly because there are some issues. As it is a basic demo, you get little variation in enemy types, meaning each wave tends to feel rather similar to one another outside of more opponents appearing and more intense music. The final round's music, while the most intense, also tends to fade out early and thus leave you in silence. You can, rarely, get stuck on the stairs and need to rely on continually spamming your aim button to get free. There is a button to go to the main menu, but it doesn't work, meaning you either need to die or Alt-F4 to get out of the game. The trees have no collision. The gallery scenes are unreliable, often depositing you to the menu without giving you a scene. But the overall basics are there; while I would love to see this expanded, the biggest difference from most titles on this site is that the experience is enjoyable as-is. The zombies are great at ambushing you, plus sprinting still results in them only being a short distance away, meaning you always feel like a mistake can end your life quickly. Not knowing when a zombie will show up out of the fog makes every shot a gamble.
Perhaps the worst issue in this game is that it has zero guidance. You are dumped into the game, fully expected to know how everything works, with 30 seconds before the waves start coming (and instantly if you hit the Q key trying to figure out what buttons do). There is a controls guide in the menu, but it is easy to overlook, meaning something like figuring out how to shoot the gun can be harder than it needs to be.
To shoot the gun, you need to equip it first, which makes sense since you might want to look around at your character. This is aided with a button for walking. The main issue is that the first wave charges after 30 seconds, then each additional wave requires you to be preparing for it. There is no breather, no time to slowly walk around. It makes sense when you are fighting, since a good part of the gameplay is that constant pressure, but even beating the seventh and final round will just award you another timer dumping you to the main menu. The best you can get to looking around is to leave a fat zombie on the map, since they are slow enough that you can generally look around as needed, but you never get that full break. Having the freedom to look around at the end would make this part a lot better.
Between each round, you rush into your house and restock. Don't stay inside your house or you will get punished for camping however, which is shown with an instant scene. It makes sense for the gameplay to not wish for the player to camp, but the scene is a bit jarring and doesn't really make much sense without any context. Plus, with a bit more pathfinding, it might be a possible avenue to let the player have; the swarms can quickly get so bad that having nowhere to retreat to might be the player's downfall (you can do a similar thing already on the porch or the edges of the world).
If you want a game with a lot of porn scenes or a sensible story (who is restocking the house between each mission? why did she decide to live in the woods after a nearby resident saved her?) you might want to look elsewhere. If you want some solid shooting gameplay that features waves over boring road walking, but with the added spice of rape on death and clothing damage mechanics, this might just be a gem in a world of endless VNs, RPGs, Japanese, and consensual/lesbian sex games.