In a world torn apart by Titans, Adrasteia stands as the last living heir of a once-mighty bloodline, the sole guardian of a fragment of Ymir's first spine-an artifact that grants her an unparalleled power that no other Titan shifter can wield. With a heart ablaze for revenge, she embarks on a perilous journey to Paradis, the notorious island of devils, driven by a single goal: to reclaim the Founding Titan and avenge her fallen kingdom. But what she doesn't realize is that the very power she possesses has its limitations and binds her to a haunting cycle of history, a chain of repetition that can only be shattered by rewriting the destiny of the future. [Attack on Titan x OC]