(Spoiler-free review, not that there's much to spoil in the first place. . .)
This anime can be successfully summed up by that one picture of Sakuya in the black shirt with nipple holes.
It's revolting to look at, mildly disturbing, super rapey, and flat as a sheet, but will have you crying laughing at 2 AM as you realize it's the most flawless thing you've seen in years.
Simply put, it's beautiful and I will never regret my perfect ten for this series. I love it and there will never be a more flawless meme ever churned out by the anime industry.