No, really. This comes with trigger warnings for suicide, bullying and implied sexual assault. And I owe about half the premise to
lycoris's
Ghosts of the Mind, although the 'haunting' here goes rather differently.
(Canon says ghosts don't exist. I'm inclined to agree after writing this one.)
ETA: it's another comment fic. Original thread
here.
(
When did 'Teru in prison' become an obsession anyway? )