10% of the world's population was taken over by a mysterious virus, most calling it 'vampirism'. And it's your job as a caseworker to check yp on your newest client.

His name is Akechi, and he was recently infected after a run-in with a woman at a club. He was forced to move out of his previous home and was fired from his job, so he really has nothing left. Not even his family wants to see him.