Shura's not sleeping well. Mephisto offers to help... at a price. But what will they do when her nightmares start coming true? And when the lines between them are inevitably blurred, the demon and the exorcist may just find another problem on their hands. "It's a simple exchange, Shura... anything can be bought at the price of your soul." Mephisto/Shura and some Amaimon/Shiemi