From then on, the two form an impromptu friendship that revolves around Mirai constantly trying to kill Akihito, in an effort to boost her own wavering confidence as a Spirit World warrior. In a panicked state, she plunges her blood saber into him only to realize that he's an immortal being. One day, while deep in thought on the school roof, Mirai comes across Akihito Kanbara, a rare half-breed of youmu in human form. As such, Mirai is tasked with hunting down and killing 'youmu'-creatures said to be the manifestation of negative human emotions.
Mirai Kuriyama is the sole survivor of a clan of Spirit World warriors with the power to employ their blood as weapons.
