I started following this manga when it was still decently early into its production, around chapter 40. and quite honestly the really messed up dark and sexy stuff was pretty good and definitely something you don't see a lot of. The phrase "psycho thriller" definitely comes to mind when reading the story and for a large part of its publication it handles gore and sex in a weird but interesting way.
But when a series is this weird and surprising anyways, the absolutely weird plot twists it introduces ruins the story. Obviously the main girl is a yandere from her LOVE of her box cutter, but towards the end her use of violence seemed more obligatory to recieve a wow and shock factor than to progress the plot
By the end I was just reading to finish my experience and get it over with