Gameplay is good. Like most of, what I'm going to say, "pixel animated point-click top down" style of games, pratically all interactions are managed by point and clicking, requiring only that you have good observation to spot certain things that will give you a secret skill, achievement, etc. To me, the point of gameplay for these games is to allow H-scenes to happen in a logical and more immersive manner. Other than that, not any good points to say it. The gameplay itself isn't appealing enough to be it's own reason for existing. There's also mini-games, which most are pretty simple and serve to gain money, xp, etc.
Mechanics are quite advanced for these styles of game, having two skill trees, achievements(which give you certain abilities) and a mood system that increases depending on the sex position you choose. Basically, everything is directed towards increasing types of moods and affection(which progress the story for each girl). I can't say that increasing the mood to it's maximum is rewarding enough for all the work you have to go through. But more on that later.
Story should've been probably one of the highest points for the game. It's stronger than many games similar to it. Every girl has a distinct storyline and personality. My issue is that the story focus too much on the sweetness of it all, instead of the forbidden, if not incredibly wrong side of them doing sex with the protagonist. It's not spicy. It's diabetic. My favorite story would have to be Kanae, because it's one of the few where it can't pass as sweet, since the wife is literally cheating on her husband while fucking a kid.
Ambient is great and helps a lot setting the mood for the game. Each scenario feels distinct and it's filled with things to do. Seems like a simple thing, but it's what I find to be one of the best things about this game that others fail to do. Space shouldn't exist for itself. Almost every inch of space in this game(aside from public spaces) is useful for doing H-scenes. This is what game like this should aim at. If the house of your game has a bathroom, then it should have an available H-scene in the bathroom.(be it on the sink, in the shower, etc). If it has a living room then it should have something in the sofa, over or under table, etc. And so on.
Sex scenes. This game prioritizes a lot more quantity over quality. Which isn't to say that it's necessarily a bad thing. Like I said, a lot of space to do H-scene, a lot of girls. But the H-scenes itself are probably the less enjoyable of all the games similar that I encountered. I can't zoom in and most of the sex positions have a angle that doesn't allow you to see the girl(the MAIN POINT of all) and the kid is blocking it. So you see more of the kid than the girl, most of the time and there isn't a transparent option. Even the extra panel that serves as a "zoom" and has more elaborate drawning and animation consist mostly of ass shots(which are pretty good), but don't allow you to enjoy the rest of the body.
The other problem of prioritizing quantity over quality is that there is a lack "personality". In all H-scenes, the character react the same or have the same body language, and the mood system doesn't actually change the H-scene like some "NTR mode" or "Mindbreak" you see in other games. It would be another story if the sex positon were tied to a girl, so you would have something different for each one, but here it's a skill, so you use it on all and it just the same with a different clothing. Sound effects for H-scenes are good and the scenes are fluid.
The game also has a lot CG scenes(for each "chapter" of the story for each girl), which aren't animated or pixelated, but are very good for the most part with good dialogue and sound. There's also "pictures" with a more kid-like drawning which you'll collect during the game.
Customization, if you can call it that, exists, but seems limited for the most part. Depending on the time you choose to do the act, you may find the characters wearing pajama, but, again, the game doesn't seem to take advantage of that, if not for the three main characters(sex during sleep). I want to reiterate that the game has a lot of options. A lot. but still doesn't change the fact that most are mediocre when you really get down to it. Aside from the CG scenes.
I feel like the perfect score for this game would be between 3-4 stars. I would be insane if I called this game average(which is 3/5), but giving 4/5 makes it seem like it's almost perfect and there's lot to improve I think.