Misao is a sixteen-year-old high school student. She has been plagued with the ability to see monsters ever since birth. Because of her ability, she was never able to make any friends until she met Kyō. The monsters were harmless until her sixteenth birthday; on the day she turned sixteen, a monster possessing one of the schools idols attacks her. Before she was injured any further, Kyō came to save her and healed her wound by licking it. It is then that she discovers that he is a demon and that she is the "bride of the prophecy" for the head of the Tengu Clan; she was chosen to be the wife of the next head of the clan ten years ago. When she was a child, Misao became attached to Kyo and they had made a promise that she would be his bride. However, she was supposed to marry Kyo's older brother, Sho, who was the heir to the clan. As a result, Kyo left Misao's side in order to surpass him and become the heir. At first, she was scared of Kyo for his stoic personality and demonic powers, but grows to trust and understand that he is willing to do anything to be with her. She later falls in love with Kyo and decides to fulfill her promise to him by becoming his wife, once she graduates high school. They begin a romantic and sexual relationship from then on. After Sho's death, Misao notices a change in her powers, which no one is able to touch her and her scent is overwhelming. It is discovered that this is because Misao is pregnant with a demon child. Despite being told the baby could kill her during childbirth, she refuses to abort it because she has grown to love her unborn child. Misao gives birth to a boy whom she named Sou. Instead of dying, a miracle happens when Misao wakes up, and even though it costs her most of her ability to walk, she is able to live happily with Kyo and Sou.