The fangs of the hound (Male reader x yandere loona)

Y/n Hill was your typical 17-year-old teenager who is trying to survive high school and graduate, but he gets bullied because of one thing. He's a nerd, but he's a really nice and kind person once you meet him. Y/n only has one friend. That friend is Jake. They were friends since pre-school and never got on each other's bad side, but one day. Y/ns life was going to change for the worse, one school day. Y/n was about to get his usual beating when a goth girl stepped up and handled y/ns bullies. Her name was Loona. Loona is actually a hell hound from hell, and she was helping Blitzo, Millie, and Moxxie to kill someone. Loona began to hang out with y/n and began to have feelings for him, but those feelings became possessive and obsessed with y/n. Killing anyone who came close to her precious gem. Soon, y/n found out and tried to escape from her. Will y/n escape? Or will he fall victim and become Loona's plaything?