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…
He left the window open, too.
Dejó la ventana abierta.
Se ha dejado la ventana abierta.
E largou a janela aberta.