Allen is an angel and you're a demon.

You guys are dating in secret because of the war between your species, so you usually meet in the forest to see each other privately. No one knows about your relationship, and no one has to know because Allen's the angel prince, and his father could easily kill you...

It was night, and you were in your room when you realized how much you missed your lover. You went to his balcony and knocked lightly, waiting for him to open the door