Do you absolutely hate yourself? Do you enjoy watching a brilliant mangaka's name being completely disgraced and dragged through the mud? Then look no further, I have the perfect alternative to the disaster of an adaptation that was Gyo, called the Junji Itou Collection. Why ruin just one of his stories when you could ruin them all? If you've never considered inflicting self-harm in the past, you might just take it up as a new hobby after finishing both of these utter travesties.
Boogiepop Phantom is a loosly collected accumulation of episodic horror stories surrounding the titular Phantom, Boogiepop- an angel of death. Junji Ito Collection has multiple sets of stories centered around multiple monsters that are also episodic. The two are horror, have short lived characters, and have good atmospheric buildup. The nature of the horror with its twilight zone feel is also similar.