Ayakashi

As a child, Yuu Kusaka wished on a shooting star to fight for justice and protect the vulnerable. After the death of a close friend, that promise loses its meaning, and he begins ignoring the suffering around him—using the strange power inside him for profit rather than for anyone else’s sake. That detached routine shatters when a classmate with similar abilities forces him into a fight for survival, until a mysterious girl, Eimu Yoake, intervenes.

Eimu explains that Yuu’s abilities come from an Ayakashi: a parasitic entity that grants supernatural power while steadily consuming its host’s life. With her help, he draws out the full potential of what he carries, and the cost becomes impossible to ignore. Pulled back toward the vow he abandoned, Yuu takes up the fight against others who wield Ayakashi for cruel ends, while searching for the truth behind his friend’s death.