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…
That's a big yawn.
Buenos días. ¡Qué bostezo más grande!
¡Buenos días! Hala, menudo bostezo.
Que bocejo, hein?