Crime Watch - A Scrutinized Fanfiction

Y/N is a college sophomore who is struggling financially due to student loans. At the start of the school year, their cousin Luna texts them asking if they would like to watch over her house while she is gone for a few weeks. Y/N accepts the offer, but has no idea what she is in for, especially when it comes to the mysterious, psychotic man who lingers outside of Luna's house at night. Who is he, and what are his intentions for Y/N?