The Hollow Shadow is drawing near. Akihito knows that Mirai wants to risk her life in a fight against the powerful youmu. The only way to stop her is to learn more about her past and confront her, but she’s been avoiding him...

At long last, Sakura is ready to confront Mirai. Now Mirai must decide whether she will fight to live or die for atonement. What would Yui want for Sakura... and for Mirai?

This episode takes place two years prior to the anime series and begins when Hiroomi receives a request for a job from his older sister Izumi: to subdue the invulnerable half-yōmu Akihito. Hiroomi's younger sister, Mitsuki, encounters a dark silhouette in the street on her way to follow Akihito and her brother.