After defeating a demon, Yakushiji Teruki is bound by a demon that brings pain to humans, in the most unusual ways that demon is bound by Shiki-kun through.....hemorrhoids, which is an illness in his anus...yes anus. All of a sudden, a girl by the name of Miura confronts him, what does she, the unsociable classmate want from Shiki-kun and his....anus? Find out!