Sword Gai The Animation

Raised by a swordsmith, Gai grows up fascinated by Shiryu, the cursed blade connected to his birth. After an accident costs him an arm, his guardian forges the sword into a replacement, binding the young man’s body to its hunger for violence.

Gai is not alone: ancient weapons possess other people, transforming them into beings at risk of losing their humanity. As an organization deploys warriors against these threats, he must struggle against the darkness inside his new limb and the fate it threatens to impose on him.