Pervert Action: Timelapse? Western NTR games are a Yikes for me and the number of Pervect Action games that it seems to have gives me headaches.
Western NTR games are yikes indeed but BBBen (guy who makes the Pervert Action games) does a good job of both NTR and vanilla/harem writing. His art style is also heavily inspired by anime (but it's 3D stuff and may not be up your alley)
I personally recommend
Pervert Action: Legacy first, as
Timelapse is yet to be finished. Legacy was BBBen's first time dipping his toes into NTR. While there isn't *that* much NTR in Legacy, what IS there is pretty damn sweet. You're in control of three maids, and can let Hiroshi (sleazy pervert merchant) pay you money for some alone time with your gal. There's a decent amount of NTR scenes per maid, and also some threesome ones if you let him fuck two different maids. My only real complaint is that there isn't more of it.
Timelapse so far is shaping up to have even more NTR content with Hirai, your 'friend' (also a sleazy pervert) (also pays you money to take your girls out on a date). I played a little bit of it a year or two ago but I haven't played it since because I want to play it when it's fully finished.
There's also
Pervert Action: Crisis (played through this, the only real 'NTR' here is at the end of each playthrough and isn't enough to really be classified as anything other than voyeurism) and
Pervert Action: Future (I skipped this because it has no NTR at all I think). There's also
Lord Goblin where you play as a goblin lord in charge of a bunch of maids. I don't really know much about this game as it's relatively new, but I think I remember reading about how BBBen (and his Big Brass Brand) plan to add in some sort of character who will pay you money to fuck your maids or something. I cannot confidently determine how much NTR will be in that game.
It should be noted that Crisis, Future and Legacy are all text-based adventure games where you have to type commands in. This is a make or break sort of thing for a porn game and I can fully understand if it gets in the way of your enjoyment of the game. I personally really liked it. Timelapse, on the other hand, plays much more like a visual novels and is entirely GUI.
Overall, BBBen is probably one of my favourite western devs (not a high bar let's be real, but in general he's one of my favourite devs). Usually a developer who tries to balance harem and NTR fails miserably and leaves everyone disappointed, but I think
BBBen does a great job on both fronts. I usually don't play harem games, but I definitely enjoy the harem parts of his games. I expect payment for this wall of PR text, please and thank you.