Satanic romance

This idea is from the wonderful Mazura-chan from her book Owari no plots!

Mikalea was the greatest vampire in all of hell, he was the strongest, the smartest, the most beautiful, and not to mention the most pure. This of course did not go unnoticed by the ruler of hell Yuichiro, very few have seen him however his very name strikes fear into the hearts of the citizens of hell. To please their ruler the seven most trusted soldiers, the seven deadly sins, are ordered to bring Mikalea to him. All goes wrong for them until Yuichiro decides to make an appearance.