The Summer Hikaru Died, Vol. 1

Yoshiki knows his best friend Hikaru is dead, replaced by a creature from the mountains that has stolen his face, voice, and memories. Despite the obvious danger, Yoshiki finds himself unable to let go, trying to maintain a normal life with this unsettling copy of his friend. But as the creature's true nature begins to surface, their strange arrangement threatens to unravel the fabric of their quiet village.