Suggest me a book like No Longer Human

I love dark, depressing, and disturbing media. I read junji itos cover of no longer human and fell in love with the plot. I the read Dazai’s novel and loved that too (though to be honest in my opinion I prefer itos adaptation). I really vibe with psychological horror, especially suicide themes. Please suggest me some yummy books!! Nothing is “too much” or off limits for me 🙂 to add more, I enjoyed Guts, and I Have No Mouth but I Must Scream