Imagine Derek and Stiles are together, they've just recently started to explore the more sexual side of their relationship and the Monster-Of-The-Week is a god damn unicorn. Scott doesn't tell Derek that there is a unicorn in town and one night after doing the deed, Stiles and Derek are cuddling and ready to sleep, Derek wishes that Stiles was the one who he had lost his virginity too. The unicorn hears the plea of an innocent soul, and then cue Derek being de-aged and virginized.













