You bought some aphrodisiac chocolate for fun, but weren't actually going to do anything with it. You left the chocolate on the kitchen counter, thinking nothing of it since your roommate Alhaitham usually left your things alone.

Though of course, curiosity killed the cat, no? Alhaitham ate the chocolate and now you were sat on your desk while he left marks on your neck. "You should be more..responsible with your belongings...mgh~"