Is that what Karryn's Prison is too?
It doesn't need to be entirely lose fight for sex. It's just probably the fastest way to get started on the sexual combat. After a while, you can turn the entire set of fights into nothing but sex, same with Saria Reclaimed. Just takes a while to get that part in motion, since it's supposed to represent the corruption of the character over time. Not for everyone since it takes a bit to get going, but once it's up and running you can honestly clear the whole game with sex combat. Plus there's scenes in Karryn's Prison that are minigames that can lead to sex related to the scene. The receptionist being fucked while still trying to do paperwork, the barmaid getting groped and if drunk enough drinking cum out of the pint glasses, etc.
Monster Girl Dreams is mostly about making sure you learn (or look up, whichever works for you) what you need to avoid certain moves and do more damage with. Each stat is viable, so getting the skills associated with that stat and just putting in the effort (and maybe a little grind occasionally, but not bad compared to most games that need it). I know there's plenty of talk about builds in the game thread if you need something to get you started, and the wiki is quite helpful on tips as well.
Seeds of Chaos is going to be hit or miss. NTR is avoidable for people who are against it, and it doesn't remind you to use your stat points... But in general it's just a management sim with rpg mechanics and rng. Not going to work for a lot of people who are mostly VN players, but the story kinda works. You can choose to completely give in to them and revel in your evilness, or try to sneak some defiance in here and there along the way. He just opens up to their idea more since, after it's been explained, he seems to always come out on the wrong end despite doing everything right. Maybe the idea of freedom vs. the status quo and the rules of the monarchy/church is the way to see real change in the world for the average person. At least that's what it seems to be going for to me.