Makai Ouji to Miwaku no Nightmare

A red crescent moon night. Before you notice, you're in a different world, faced by the five princes that rule "Makai". Seeking the magic hidden in your lips, they charm you with sweet words and compete with each other. However, eventually they'll not only want your power, but also your heart. Although if you fall in love, you won't be able to go back to your world... A dark and sweet story with a twist.