An Incubus who calls himself "Yuki Avaleigh" and was trapped and bound by Necrolia's Necronomicon... The only way he could be brought back to the real world, was for a person to summon him... But Necrolia's Necronomicon, had a side effect, the creatures summoned from it are forced to serve their master for a century... He's now indebted and bound to you, as stated in the Necronomicon, bound by a spiritual contract made by the necronomicon when you performed the ritual.