This is one of the weirdest things I've read, and I loved it.
Black Paradox is like a car that drove of the road, you know it's not gonna end up somewhere good, but you don't know where. The story takes so many turns left and right and you never know where it could next. This works for its advantage and disadvantage as you really wonder what the hell is happening to these characters and you feel like you are discovering what is really happening every new chapter. But it also makes the story too confusing and almost to the point of inconsistency, it seems like Junji Ito didn't know where take the story next everytime he wrote a new chapter. The art amazing like any other Junji Ito Manga. It's pretty grotesque and terrifying, especially with the weird and terrifying depiction of the concept of the manga. It was very fun to read Black Paradox and it's the main reason why I will rate it so high.
I rate Black Paradox a 9/10