Ép. 1: Yukio découvre dans un rêve une étrange tache de naissance ressemblant à Hokuto Shichi Sei

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Yukio is counting the moles on his body in the bathroom of the dorm. He counts ten thousand of them, but suddenly notices a strange pattern of moles that hasn't been there before, in the shape of the Hokuto Shichi Sei from Fist of the North Star. He also sees another mole that has just appeared, flashing red, a sign of death. He panics when he thinks the number of moles are increasing and looks at his hand. His hand is suddenly covered with moles and more keep appearing. He screams. It is then revealed that Rin was calling for him and that it was all a dream... (Source: Ao no Exorcist Wiki)