While the episode adapts elements of Kaguya's backstory, it is considered mixed canon/filler as it expands significantly on details only briefly mentioned in the original manga.

The battle against Kaguya—who transforms the God Tree into the Ten-Tails —lasts for months before the brothers successfully seal her away, creating the moon in the process.

Hagoromo confronts Kaguya after completing his Sage training. He is forced to fight his brother, Hamura, who is under their mother's mind control.