Should've Said No (Nightmare x OC)

Scarlet Harket is being chased by an unknown group of assassins who wants her dead for some reason. But everything changes when she runs into a small blue skeleton and gets introduced to whole new race that she didn't even know were real. But things start to get difficult when it seems like she can't find a safe place anymore and starts to fall for a certain goopy skeleton tentacle monster. What will happen when Scalet starts to think that she should be said no to the small skeleton's offer?