/lit/ - Literature

Besides it's influences (Hi no Tori and Lovecraft) is there anything similar to this? Something that deals with how we perceive reality maybe?

Saya no Uta

And no please don't give me De Sade... I tried that guy and he still doesn't beat this game.

Saya no Uta has a fantastic hook, before quickly turning into garbage. For those unaware, the game takes place when MC gets experimental brain surgery after a car crash that leaves both his parents dead. He sees everything in the world as being made of meat, his friends are disgusting monsters to him, food is unappealing and borderline inedible. The first few scenes of the visual novel have this great feeling where you're not sure if the main character is insane or if he really is trapped in some form of hell. Then he is explicitly shown to be insane, the artist makes a parallel to the disgusting food by making people's organs vegetables which is completely retarded, and finally turns the vn into loli NTR. So, here's the prompt: Given the same hook, how would you change the narrative to continue the same theme of not being sure of the sanity or reliability of the narrator?