Natsume is invited to go to a pottery classroom with Shigeru. It's being held in an inn where he once stayed. When he goes there, he meets an old friend: the young fox child he once saved.

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…