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'm not feeling well today,
 so I'm going home.
Hoy no me siento bien, así que me iré.
Hoy no me encuentro bien, así que me voy ya.
Não me sinto muito bem, vou pra casa.