I really like this kind of twisted love story, although this book is going to have a lot of CW/tw, so I hope other readers will consider it before reading it.
I like this kind of troupe, but at first I thought it's gonna be a wicked love story full of the obsession of a mad person, well, it's kind of true, but it's more than that. Personally, I prefer the Chinese title "MadMan" over "Psycho" because when you finish the book, it literally depicts the content of the book, whereas "Psycho" does not.
Although in the middle of the story, I kinda guess where this story will be going, but it keeps interesting to read, some phrases make you feel like watching a surrealist movie, and make you feel like flying on the cloud (or "high").
I checked the author's other stories, and it seems the author is a type who writes stories that require a high tolerance from their reader, but I wish there were more from this author published in English.
About it have a Happy or Bad Ending? I think it depends on how the reader will interpret the story. This kind of story cannot have 100% happy or bad ending, but for me, it feels like a bad ending, but it's a happy ending for the protagonist. Perhaps it can be described have same feeling when you read the ending of legendary Kaori Yuki's manga Boy's Next Door.
I hope Tu and A-Zi can be together forever ;_;
(but I'm still glad ChengXi truly loves him, and Zi is not one-sided, but it's too painful)