Kurozuka

In ancient Japan, swordsman Kurou flees pursuers with his companion Benkei and takes shelter in an isolated home belonging to a mysterious woman named Kuromitsu. Kurou falls in love with her, then discovers her secret: she is immortal and has survived across generations by drinking blood.

He attempts to join her endless life, but betrayal interrupts the ritual and sends him into a long sleep. Kurou awakens in a devastated future with no understanding of how he arrived there, pursued by an organization seeking the same secret of immortality. His memories are fragmented and time itself feels unreliable, so he chases Kuromitsu across centuries of violence, trying to discover what happened to him and why history seems determined to repeat itself.