: We see the earliest instance of a human ( Hagoromo ) learning to balance natural energy, a skill that eventually defines the power of the Sage of Six Paths.

: Suspicious of their mother Kaguya's rituals, Hagoromo and Hamura travel to the Peak of Demise. There, they discover the horrific truth: the roots of the God Tree are encased with countless humans being drained of their energy.

: The brothers encounter the Toad Sage, Gamamaru (a younger version of the Great Toad Sage), who takes them to Mount Myōboku. Through a Memory Stone, he reveals Kaguya's history—how she arrived on Earth, ate the chakra fruit, and began ruling through fear.

: It establishes that the Sharingan and Rinnegan are linked through Hagoromo's lineage, while Hamura is the progenitor of the Hyuga clan's Byakugan.

You can watch the full episode on platforms like Crunchyroll. Hagoromo and Hamura | Narutopedia | Fandom