TL;DR: Game is designed to be fan service, it does it well and even keeps within the bounds of the KP universe quite well. Girls are fleshed out with different personalities and "paths", game isn't grindy, dev is active and constantly listening to feedback and providing help. Highly recommend if you're a fan of corruption and want a KP parody that has a good balance of comedy and 'edge'. You feel like a (smart) KP Villain in this one. Think Shego's intelligence with Drakken's motivation, instead of the other way around.
This is a fan service game. That's the first thing you have to understand going into it.
In the same way that Kim Possible (the show) has a lot of ridiculous assumptions (everyone just accepts that she's a superhero, she gets zero special treatment for it, Ron is a bumbling mess that for some reason is her sidekick despite having zero qualifications for the job, Rufus is a talking mole rat, Shego has green hand ray powers and everyone just accepts it, etc. etc.), this parody has a lot of ridiculous assumptions (the girls are all sexually frustrated, they're all rather selfish in seeking MC's attention (and don't care how it affects the other girls, and in Ann's case, her husband AND daughter), Senior is basically a Chad who exudes charisma from every pore and has a massive dick (which is basically a porn staple, but come on, Senior was always a Chad)).
Some people are taking issue with that and giving the game a bump down in reviews due to that. It's not the only issue it's being bumped down for, but it's a big one.
Something else to understand is that the dev is VERY active (currently, at least) in the comments here providing help and taking insight from feedback. That's rare. I fully expect the lesser annoyances to be fixed going forward, but time will tell.
The questing system is a bit annoying, it would be nice if a clearer way to progress was given, such as a building being highlighted when an objective occurs there, or the quest log (which dev has said will be revamped soon) had more clear instructions. The RNG factor in triggering some of the quest events is nifty from a dev standpoint, but can be frustrating when you keep rolling "no" - though you can kind of circumvent that be rolling back and re-engaging the trigger area most times. This wasn't enough to bump it down a star for me, though. Especially with how helpful the comments and the dev himself has been.
I also don't agree with some of the plot movement (there's a 'big moment' that happens early on that kind of info dumps a whole lot of exposition as to Senior's condition that felt forced and unnecessary to me), but again, not enough for me to bump the rating. The story, by and large, is very coherent.
Okay, on to the good stuff:
The writing is spectacular. The dialogue rarely feels forced, which is usually a huge red flag for games here.
The premise, once you understand this is pure fan service, is incredible if you're a fan of "corrupting the heroine/innocent/whatever." It's a very slow burn, but each girl has different 'barriers', some of which aren't really sexual barriers (you advance to actual sex pretty quickly with one of the girls, but there are other moral and mental barriers involved with her that serve as the progression driver), so the dev has balanced sexual "advancement" quite well after you get into game.
As the title art suggests, the game is going for a male dom harem route, primarily. But the girls still have a personality. And they have DIFFERENT, true-to-the-show (more or less) personalities. Kim is innocent, Monique is high fashion and a bit high maintenance, Bonnie is a bitch, Shego is Tsundere, Ann is repressed, and so on.
The game has an edge to it that most games of this genre lack (like Something Unlimited, for instance, which kind of falls flat on feeling like a villain in my opinion, the "mind control" tech in that game just feels lazy).
In THIS game you have to work on actively corrupting each girl, and each girl has a very different corruption route, filled with high school drama, repressed feelings, moral obligations, and everything in between.
It still has good comedy, but you're playing the bad guy, and it feels like you're playing the bad guy, even though it has some classic Senior/Junior KP humor mixed in.
The game has yet to reveal what the end game will be exactly, but it has hinted at corruption and possible subservience. If that's your jam, and you are looking for a KP parody along with it, I can't recommend it more. The artstyle might take some getting used to, but you get over it pretty quick, and the beginning is pretty slow, but once you make it past the opening exposition, the game really opens up in a way that feels familiar for training games, without feeling as grindy as most of them.