Blue Exorcist: Runaway Kuro

In the late Edo Period, a demon known as the Impure King killed thousands of people. After defeating the demon, the Knights of the True Cross kept its left eye safely sealed away on Academy grounds - but now someone has stolen it! Hearing the thief has taken a child hostage, Yukio and Rin go to help. The investigation and pursuit will lead Rin and his friends to Kyoto and involve them even deeper in a sinister plot! But will his friends' knowledge that Rin is the son of Satan drive a wedge between them?

This world consists of two dimensions joined as one, like a mirror. The first is the world in which the humans live, Assiah. The other is the world of demons, Gehenna. Ordinarily, travel between the two, and indeed any kind of contact between the two, is impossible. However the demons can pass over into this world by possessing anything that exist within it. Satan the god of demons, but there's one thing that he doesn't have, and that's a substance in the human world that is powerful enough to contain him!! For that purpose he created Rin, his son from a human woman, but will his son agree to his plans? Or will he become something else...? An exorcist?

Sequel to Ao no Exorcist: Yuki no Hate-hen. Yukio parts ways with Rin and makes his way to the Illuminati. In order to face Yukio, who is seeking strength and the truth, Rin decides that he must learn the secret of their birth. With Mephisto’s guidance, he embarks on a journey to the past. Rin traces the footsteps of their adoptive father, Shirou Fujimoto, and birth mother, Yuri Egin. But the path they took in life was harsher than Rin could have ever imagined…. Why were children born between the Demon God Satan and a human? What was the Blue Night? And when Rin learns everything, what will be his answer?

Sequel to Ao no Exorcist: Shimane Illuminati-hen. Uncover the dark side of the Knights of the True Cross and the mystery of the "Blue Night"! Brothers Rin and Yukio head to Lake Towada in Aomori to search for Shura, who had suddenly disappeared. There, they find Shura’s birthplace – the place where Shiro became her guardian. As their search continues, Rin and Yukio discover the fate that awaits Shura. Meanwhile, Lightning, one of the Arch Knights, arrives at the Japan Branch of the Knights of the True Cross and begins his investigation into the Illuminati. Lightning deduces that everything began on the “Blue Night,” as he gradually steps into the dark side of the Knights of the True Cross….