Taking place three years before the TV series, episode zero follows Hiroomi Nases mission to subdue the infamous half-human, half-youmu Akihito Kanbara. Curious about the mission, Hiroomis little sister, Mitsuki, tags along with him, and the siblings meet Akihito for the first time. However, they soon discover that they arent the only ones seeking out Akihito, and thus begins the story of Kyoukai no Kanata.

[Written by MAL Rewrite]