AN: Wrote this quickly with a concept in mind. I wanted to flip the roles, of Harry being dark and Draco being light. Also, the sin I talk about is that they see to be opposites in every way. (Light and Dark, Gryffindor and Slytherin etc.) So, it's "unnatural" for them to be together.
Once there was a dark prince and he was something like poisoned mead, a sweet taste but forbidden in every way.
If Draco, a prince in his own respect, got too close to see what lie underneath the man, that's when his allure would reach out and enrapture him.
His gaze was smoldering green, connecting and personal, so that he couldn't look away.
The white prince had too much curiosity, and just when he couldn't stand the seduction calling out to him, something inside him fell deeply into a slumber.
His heart couldn't beat with liveliness anymore, because the sin of falling in love was the poison, and it dripped inside him until he succumbed to it. Then he decided to meet the dark prince.
It was there, in a Gryffindor bedroom where they encompassed each other in sin and love.