Humanization Drug

Huminzation Drug is a medicine created by Hanabusa Aido to turn vampires human.

Concept
Hanabusa wished to help turn vampire human if they had a human lover; especially since he married Sayori, Yuki's human best friend. However, he couldn't create before she died of old age.

Trivia

 * Those from Isaya Shoto's lineage tend to reawaken their vampirism if their lovers die. Though Ai mentions it becomes less frequent as their bloodline grows thinner and thinner from Isaya.
 * The cure for vampirism can be used as a part of a stop-gap plan to help cure diseases. A little girl had a terminal illness but was turned and lived a long time; once the cure for her disease was found, she was turned human and her memory erased.