As Escha, Logy, Threia, and Reyfer explore another set of ruins, Escha discovers a slab depicting the Unexplored Ruins and a girl levitating above it. The group later discovers a large mural. At the R&D headquarters, Threia explains that the mural was depicting the construction of the ruins they were in. It was an effort carried out by the teamwork between multiple countries who were researching a way to grow plants in a barren land, though they were unsuccessful and their civilizations died out in the end...