Overall: This game doesn't really have any major faults other than it's just too short. It's so short that it's not really worth downloading.
Story: This game takes maybe 2 minutes to play (per ending), so there isn't any real story.
Writing: There are a few mistakes, but it's better than average.
Art/Renders: I think the art looks good. It says that it's AI CG, but it looks like plain 2D art to me. The characters are not actually integrated with the backgrounds, though, which always looks cheap to me.
Animations: N/A there are none.
Gameplay: Different combinations of choices give you different endings and you can get all 4 endings in 5 to 10 minutes. The game let's you rollback, but you can't modify choices unless you reload a save or start over. That really isn't a problem since you can get through the game from start to any ending in around 2 minutes or less when you skip text you've seen before.
Hot Scenes: There are only 3 (for 3 of the 4 available endings) and they very short, consisting of only a 2 or 3 renders each. You won't be fapping to this, but at least the art is pretty.