Natsume overhears whispers that a powerful youkai is reviving, later that evening he is trapped in a bottle as an offering.  Humans can’t see or hear him, so Nyanko-sensei decides to help the “best” way he can…
I really don't know the details.
Yo tampoco sé con mucho detalle.
La verdad es que no sé mucho sobre él.
Também não sei dos detalhes,