This one is crazyyyy but anyways
Plot: Plot is kept fairly simple, unless you aim for the secret ending where there are quite a couple of twists and a cooler boss fight.
Gameplay: It's what you'd expect, though I wouldn't say it gets as grindy as other games, which is a bonus all things considered. I found myself to be at a high enough level most of the time, only needing to grind now and again for like 2 minutes before being ready to move on.
Length: If you go for a no sex run, it's about 8-9 hours in length, which is honestly alright as the game is entertaining enough. However, if you go to unlock all CGs it might take an hour or more.
CGs: The art is. whew. It's nice and there's a lot of different ones; some get reused, but that's fine. Although it should be noted, that if you just want to see the gallery, it's a better idea to go find a full save. There isn't an "unlock gallery" option at the end of the game, even if you get the secret ending.