Yuukaku ni Urareta Ore no Kanojo

Synopsis

Edo is terrified of the Kurotengu, a masked swordsman and serial killer who has cut down eight rich merchants around Ryōgoku Bridge. Nobody has been able to stop him.

The story begins when a sword thief breaks into a rich collector’s establishment and gets caught by a swordswoman from a samurai family that runs a dojo. That same night, the Kurotengu murders the police officer investigating him in a room down the hall. She leaves the thief tied up, rushes toward the commotion and draws on the killer, but his swordsmanship is on another level and he toys with her like a child. The thief slips his ropes and could easily run, but he changes his mind at the last second and only just saves her life. The Kurotengu fights in her family’s sword style, and her missing brother is taking the blame. She doesn’t buy it, so the next morning, instead of turning the thief in, she asks him to help her find her brother and solve the case for good.