Loving you is a losing game

Dream is a king who struggles to help his village and starts to trust him, no one believes in him anymore. Besides, in any relationship, he has difficulties he can't control. When he meets again his first-ever love, things drastically change for him.
Nightmare is an insomniac thief who can barely sleep because whenever he falls asleep all his dreams are about *him*, but then maybe it's all a dream, and Dream isn't actually in front of him.