"H.P. Lovecraft would be proud."

"Dark writings that drive their readers to obsession are a cliche of Lovecraftian fiction, and Saya no Uta is the real-world equivalent, a visual novel you shouldn't read for the sake of your own peace of mind, that should come with warnings that trail off into italics, ellipses, and madness and definitely not a link to its vndb entry."

"'Lovecraftian' is a word that gets thrown around too much, and too often it's used to describe any piece of work that has tentacles and a bit of slime in it, but Saya No Uta is truly Lovecraftian on both an aesthetic and thematic level. It's about the fragility of sanity, the smallness of our world compared to the cosmos and, of course, that age old adage: Ignorance is bliss."

Fuminori Sakisaka has a traffic accident which kills his parents and leaves him heavily injured. When he has a brain surgery to save his life, his perception of the world changes: everything he sees becomes blood and guts, people's looks and voices seem like monsters, and food that normally appeals to him tastes disgusting.

As he contemplates suicide in the hospital, Fuminori meets a beautiful girl among the flesh-covered walls. She introduces herself as Saya, and is apparently looking for her father. Fuminori does not want to be separated from Saya, and asks her to live with him. She agrees.

(From VNDB)