User blog comment:B214/Question and Answers 4/@comment-4547267-20141128000303/@comment-16281343-20141128112715

Ddraig wasn't involved in that SS.

~To restore Issei back to normal, Azazel tried to use the cloning machine that he used in Issei 300 but it failed. The solution that worked is tying Issei to a naked Rias all night.