Santamonikasutajio ga okuru, takai hyōka o uketa “goddo Obu u~ō” (2018-nen) no zokuhen. Sekai ni shūen o motarasu to sa reru yogen no tatakai ni sonae, kureitosu to atoreusu wa kotae o motomete `kokonotsunosekai' o meguru tabi ni demasu. Asugarudo no gunzei ga tatakai no junbi o susumeru naka, kureitosu to atoreusu wa kotae o motomete `kokonotsunosekai' no shinbu e to ashi o fumiiremasu.

Tabi no dōchūde wa, shinwa no sekai-naradeha no iki o nomu yōna zekkei o tansaku shi, kakuchi de nakama o atsume, Hokuō no kamigami ya kaibutsu to itta osorubeki teki ni tachimukau koto ni narimasu.

Ragunaroku no kyōi ga koku ikkoku to semaru Chū, kureitosu to atoreusu wa, kazoku no anzen to sekai no anzen, sono dochira o erabubeki ka to iu ketsudan o semara reru koto ni narimasu…