Notice: If you're in it purely for pregnancy, turn away now. This game leans hard into impregnation but not so much into pregnancy.
Before I address anything else, I'd like to mention that while there's an English version over on DLSite already, it's also MTL'd by the devs so don't go and burn your money there. You should be able to switch to DeepL translation if you are familiar with the Unity real-time translation plugin.
With that being said, in true Japanese fashion, what's on the tin is exactly what you get: you impregnate women via an underground project that involves transferring your semen. Quite literally, in fact. This is because, apparently, the setting is that you are chosen as this great impregnator by this android chick who is more than happy to kidnap women for you to impregnate. Your role is to bump up the childbirth rate across Japan as one normally does.
However, you don't get to fuck these kidnapped women. No, instead they are done via proxies that either are hooked up to a vat of your semen or somehow transfer your semen via convenient scientific bullshit. This includes a tube dumping semen straight into someone's uterus or an android proxy doing the fucking for you. Whether you successfully impregnate someone or not, you get points which you can use to upgrade your stats, buy items, unlock new women or upgrade your sex dungeon to be able to fuck a bunch of other random women.
Pregnancy happens as time passes, which translates to instant final trimester. However, time only passes if you close the game, meaning that you need to constantly close and reopen the game to progress. Doing so also replenishes your coom stat so you can continue cooming at full capacity.
The art is fine. I've seen worse but it certainly appeals heavily to impregnation really well. Even the pregnant stills are tasteful to an extent but nothing more than that.
All in all, this feels more like an idle simulator of sorts where you use up your coom, close game, reopen game, repeat. It's interesting to say the least but replayability is a no-go.