Natsume Yuujinchou: Ishi Okoshi to Ayashiki Raihousha S01

This anime includes two stories, one being Ishiyokuoshi and the other being Ayakashi Raiyousha. In the first film, Natsume meets a small youkai named Mitsumi in the forest. Mitsumi has the task of awakening a divine youkai named Iwatsuu from sleep. Mitsumi gets inside Natsume's mind and Natsume decides to help Mitsumi with his task. In Ayakashi Raiyousha, a mysterious stranger appears in front of Tanuma, talks to him for a bit, and leaves. Tanuma enjoys dealing with youkai and this youkai doesn't want to harm Tanuma, but Tanuma's health gradually deteriorates.