Ahead, Shinpei repeats the time loop again and again, closing in on the Shadows' true nature and aim, and the vast secret hidden on the island. To save Ushio and his friends, he faces even hopeless situations with wit and sheer will. The story twists and turns before converging on a truth of unimaginable scale — you'll want to see it through to the very end.

Hearing that his childhood friend Ushio Kofune drowned, Shinpei Ajiro returns to his home island of Hitogashima after two years. But his best friend Sou Hishigata points out suspicious signs, like strangulation marks on Ushio's neck. When Shinpei himself nearly dies, time rewinds to just before the incident — awakening a power of "time loops." Learning of the "Shadows," beings that mimic people and steal their abilities, Shinpei begins to face the truth of Ushio's death and the threat closing in on the island, repeating the loop again and again.