Demon Slayer: Bonds Under the Blood Moon

He forgot his own name, remembering only that he had to protect someone. Even after becoming a demon and taking the vacant position of Upper Rank Five, he remained a weapon born only to kill. She joined the Demon Slayer Corps in search of the brother who was the last person left in her memories. In the Infinity Castle, their bloodied blades and Nichirin Blades finally clashed. When his memories awakened in the midst of their deadly battle, how could her brother, now a demon, fulfill the promise of protection he had made twelve years too late beneath the sun that was destined to destroy him? Set against the epic of the original story, this is a requiem for blood and moonlight.