Following their reunion, Akihito Kanbara is devastated to find that Mirai Kuriyama has lost all memories of him, their friends, and her past as a Spirit Warrior. Despite the heartbreak, Akihito sees this as an opportunity for Mirai to live a normal life away from the supernatural world that once mistreated her. To preserve her happiness, they must hide her true identity and avoid growing close to her. However, as dark forces resurface and shadowy creatures target Mirai, Akihito must protect her and their friends at all costs, even as the mysteries of her forgotten past unfold.