In the realm of Neite, unsettling disappearances have unsettled the land, leading Prince Kine to enlist the female knights for a thorough investigation. Oomiya and Aria take the lead on this urgent mission, only to encounter betrayal that draws them into a deceptive snare. Trapped and isolated, the pair must confront an unrelenting tide of encroaching tendrils that challenge their strength and unity in unforeseen ways.