Beyond the Boundary: Daybreak

Synopsis

Three years before the events of the TV series, Hiroomi Nase receives an assignment to neutralize the notorious half-human, half-youmu being, Akihito Kanbara. Intrigued by the task, Hiroomi's sister Mitsuki decides to accompany him. The two then encounter Akihito for the very first time. Yet they soon realize that others are also hunting for Akihito, establishing the groundwork for the story of Kyoukai no Kanata.