Yandere Harem X Male Reader

(Y/n) is a rather decent guy, one would think.
But this decent guy happens to be cursed with a strong demonic curse called "Apathy" the consequences of which have made him extremely lonely. That is until his encounter with a witch that sets up things to turn for the worse.
"Seems like too much of a good thing leads to paranoia and insanity."
Warning: Possibly spooky and probably has themes that make people uncomfortable! Readers discretion is advised!