While the nasty old man thing is, like, kind of weird, the whole thing is clearly labelled and can be easily avoided unless you are seeking it out yourself via bad endings and what ifs, so props to that.
Game seems to hit the sweet spot between "all sex from day 1" to "you'll need to work harder than the Persona 4 Moon Link to even just kiss one of these women," which is always nice to see.
I'm mostly here for the female domination tag honestly, and while I know this game won't really cater exclusively to my tastes on that given the broader range of relationships, I am just glad we're not getting some weird "One Dude Many Sex Slaves" harem setting where he ends up becoming a dominant asshole, I've seen my share of those in many a harem fanfic about loser male characters from female centric series (ranging from Buffy to Kim Possible) over the years.
What If 3 plays up on that, yes, but I honestly love how it plays up the weird cult like vibes a situation like that would have, and how it would negatively affect everyone's lives on the long run (Having to babyproof the house when everyone gives birth, the fact everyone is very wary of them since women keep getting pregnant around them, the fact they have to literally "drug" women now to make them join in rather than harmless "Lucky pervert" scenarios, and obviously the AMAZING ending with Lucia and Ophelia's smile turning more and more sinister as Lucia's mother takes the Kool Aid.
Speaking of, I appreciate the stance the game seems to take on consent during sexual acts, either in the main game or during NTR scenarios/what ifs. It's a smidge loose at times mind you, but let me tell you, when the game outright went "What the fuck? No you're not going to r*pe your mother in her sleep WHAT THE FUCK IS WRONG WITH YOU?" I outright chortled and took out a breath of fresh air at that. I also like how some of the what ifs and NTR ending, while still on the weird side consent wise, do seem to verge for a more "woman consented to it, maybe under duress in some cases but consent is there," ESPECIALLY in... what if five?
The one where they help Kevin slim down, now, that was a MASTERWORK in NTR, let me tell you, because the whole situation, having the MC removed from the equation entirely (I don't think he even shows up in the epilogue), it's NEVER done due to outright trickery.
Yes, the fat guy is tricking the girls into helping him with money without telling them he can try to get his inheritance without it, and yes, the weight scale broke at one point allowing him to think he was actually slimming down, but truth it? None of this by his design, dude just wanted some friends/women to like him, and while he did pressure them into it with money, he never pushed them hard on it over it, the ONE time they refuse something he relents instantly (and then does a shit job at working out yes, but it's not painted as on purpose either).
Like, I feel like, if that was a completely stand alone story, and it ended with them winning the lawsuit, that could have been its own small porn game, about some fat dude and his two personal trainers, and the ways you the player can help him achieve his dream or fail at them either way.
(Also props to Brenna in the Eva NTR Ending after Hunter tricks you to go out of the room allowing him to seduce Eva for instantly threatening to murder her brother if she found out he had r*ped one of her friends after she made them meet up and all, main fucking reason why she is one of the best characters of the main 3, she will find you someone to lose your virginity to but if you so much as go a smidge out of line with her she will destroy you and I find that both extremely attractive and also a great trait to have for a female character in a porn game, we need more solidarity between these girls in these games ffs.
Or we need the girls to unionize of course. You know, "seize the means of reproduction" and all that, pass around the guy, make a schedule where they can use him in turns, I think there was a Persona 5 orgy hentai with this premise.
All in all, the dialogues are fun and the designs are interesting enough, (If a bit wonky on the ages? Aliza is supposed to be around Ophelia's age range but she doesn't exactly look that older than Brenna at first glance.), the plot is probably one of the better iteration of a true and tried formula.
We do need Nnenna from What If 4 in the main game tho come on, it'd be a waste otherwise, I know her backstory is that she's a tour guide in Africa and all but we can think of something, have her take a vacation to whatever state of the US this game is set in to flip the situation, she and another character are pen pals or something and that leads to her entering the plot.
That's it that's the review, 9/10.