Natsume's Book of Friends Season 4 Episode 12 English Dubbed Episode Title: The Door of Memories Episode Description: Natsume, accompanied by Nyanko-Sensei, set out to visit his childhood home. He visits a relative to pick up the key to the house, but is being followed by a bug-like yokai who wants him to draw a mouth for it. He leads him away from the home of his paternal relatives and Nyanko-Sensei drives it away. When the two get back on track to finding the house, Natsume is suddenly attacked by the yokai and becomes lost in painful memories of his lonely and troubled childhood of being the only human who could fully perceive and hear such demonic/spiritual beings.