Black World.Following his three month coma, Akihito learns from Hiroomi and Mitsuki that his separation from the Beyond the Boundary apparently cost Mirai her life and robbed him of his immortality. Akihito later demands to speak with Izumi out of frustration although Hiroomi tries explaining its futility. As if on cue though Izumi shows up and explains the nature of the Beyond the Boundary and her use of Mirai's cursed blood to defeat it. However, when Mirai refused to kill Akihito she was forced to reveal a way that would save him to which Mirai unhesitatingly accepted. That evening Akihito opens his last email from Mirai where she explains that meeting him allowed her to gain self-acceptance. Meanwhile, Miroku deduces that the weakened Beyond the Boundary simply retreated into another dimension to battle Mirai whilst simultaneously absorbing the supernatural energy from the real world. Miroku then uses the spear to inject a massive amount of energy into the Beyond the Boundary and exposes the black sphere hovering above the city which proceeds to attract and absorb all of the city's youmu. Amidst the chaos, Akihito and the gang are also summoned to the Literary Club where Yayoi informs them of Mirai's survival and battle against the Beyond the Boundary. She then gives Akihito the shard of the Beyond the Boundary's stone, allowing him to regain a portion of his powers, while explaining that it emerged when he was possessed by the Hollow Shadow. Finally, despite Izumi's warning, Akihito manages to pass into the black sphere by merging with Mirai's puppet version of himself and catches Mirai during her destructive battle with the Beyond the Boundary.