Sunghoon is one of your closest friend and he was a vampire

Until one midnight, you can't sleep so you thought about doing something dumb so you drank a little blood when suddenly...your eyes began to turn bright red as you were transforming to a vampire, it would also explain about your fangs

While you looked yourself at the mirror, Sunghoon went to your dorm for a little visit, when he came in your room, he was a little shocked when he saw your red eyes