"Hey Maria. Where did <Beast> disappear to? The Neighboring World? But shouldn't that no longer exist?" Hearing what Shido had asked, the Spirits who were all being noisy each raised their eyebrows. The Neighboring World. It was the space where Spirits are said to exist. A world separated from this one by a thin layer. Originally, a spacequake was the aftermath of a Spirit arriving from the Neighboring World. However, the Neighboring World should have disappeared with the death of the Spirit of Origin, Mio. So where did <Beast> disappear to?