Natsume's Book of Friends: The Waking Rock and the Strange Visitor

*"Ishi Okoshi"" While looking for Nyanko-sensei, Takashi Natsume meets a timid, small youkai named Mitsumi. Mitsumi has been chosen by his leader, the powerful ayakashi Gantetsu, to serve as this year’s "Ishi Okoshi," tasked with waking Gantetsu from his long sleep. Seeing how much Mitsumi wants to prove himself as a worthy servant, Natsume decides to help him. But they aren’t the only ones trying to awaken the divine being-time is running out. ""Ayashiki Raihousha"* One day, Natsume’s friend Kaname Tanuma is approached by a strange man. Over the next few days, the visitor speaks briefly with Tanuma before leaving. Natsume soon realizes the outsider is a youkai in human form, who insists he means no harm. Though Tanuma trusts him, his health begins to decline, making Natsume wary. What is the truth behind this mysterious visitor and his ties to Tanuma?