Person A of your OTP is a demon and person B is human. Person A has a giant crush on Person B and, not really understanding love, takes out their frustrations on the souls in their keep. Person B finds out and agrees to go on a date with them to make them stop.

Bonus: Person B was not in love with person A, but after a few dates, both of them start to fall in love.

Bonus #2: Person C is one of the souls that Person A releases after going out with B.

http://otpprompts.tumblr.com/post/138875733278/person-a-of-your-otp-is-a-demon-and-person-b-is