Standard Illusion game, though I can see them pulling the plug on this sooner or later. The customization in this game is pretty damn good, as you can achieve some very accurate waifus with mods, and the mods themselves enrich the game with what it was lacking - like POV mods and all that jazz.
I wish the game had more variable poses though, like Custom Maid at least had some niches and spicier things to add at times, this one's kinda playing it safe and a lot of poses you'd expect to see aren't there. In general, they could've done a loooooot more with the school setting, as currently it's just a walking simulator and visual novel-esque. Not much to do other than bang waifus, but it does a damn good job at banging 'em- so I can't complain, squeezed my hog.
But with aforementioned reasons this game for now could only be a short-term fun unless they decide to update it more and not just the CharaStudio, which is pretty good - seen what my jap boys on twitter have done with it and it's all good fun if you take the time to invest into creating your own scenes. (I had to make some myself to fill in the void of the lack of poses)
As it often is with these games, they usually do something particularly really good and everything else is left half-baked, so that's kinda what this game is. ( The world feels extremely empty and fucking dead, the entire school-grounds are just a walking plane of living onaholes to screw. ) If you play it just for banging the waifus, you won't find many games that can compete with it ( please add more content ) but other than that there's not much else left to offer, so I'd give it a solid 4, even if in my mind it's a 3 - I'm feeling generous, had some good continuous nutting streaks. I could list all the things you can do in this game, but honestly, it's nothing worth mentioning much and should be left up to you to judge.