Inheritance

(Yandere! Shadow Monster x Reader). (Warning: mature, dark, disturbing themes ahead for the whole story. You have been warned!) You inherited a mansion on top of a hill in a gated community from your great grandmother after her death. A shadow monster that lives inside had taken a liking to you and calls you his mate. Apparently, that's what the mark on the back of your neck symbolizes: to be his forever. (I don't own any pictures used).