Let's Solve a Case

A hundred years ago, she met him by chance. To cure his poison, she spent a night with him, took a part of his body, and left him with a mark that would never fade. Then she vanished into the darkness... That night changed the course of his life forever, and he searched for her for a hundred years... But when she finally appeared before him, he no longer recognized her...

Devoted, Abstinent Spirit Detective vs. Sweet, Kind Assistant

His disdain for her had become second nature. But the sweet, doll-like woman he had always looked down on gradually revealed one impressive ability after another, helping him solve mysterious cases and leaving him unable to resist asking:

"Who are you, really?"