Mark never bought into the idea of liking someone else's marks on his skin. The concept of a soulmate being chosen for you irked him. Not only that, but there was no guarantee that you would spend the rest of your lives together, or even like each other. So if Mark decided to dislike Arin before even meeting him, he could say that he had a good reason.
Soulmate!AU where when you write something on your skin with pen/marker/etc, and it will show up on your soulmate's skin as well. Except you can feel it, too.
Basically another soulmate au. I own none of these characters
Everyone is born with a specific mark that pertains to their soulmate. The mark itself takes form into whatever creature is to be their soulmates favorite and it is to turn into their favorite color once you both touch. It was because of this that led to Severus's fascination with caterpillars, why? Because his soulmate seemed to have fallen in love with butterflies.