Beyond the Boundary

Kyoukai no Kanata (境界の彼方, lit., "Beyond the Horizon", also translated as Beyond the Boundary) is a light novel written by Nagomu Torii, with illustrations by Chise Kamoi. The three-volume light novel series was awarded with an honorable mention in the Kyoto Animation Award competition in 2011, and was published by Kyoto Animation between June 2012 and April 2013. An anime adaptation based on the series was announced for October 2013, produced by Kyoto Animation. It began airing on October 2nd, 2013.

Plot
One day high-school student Akihito Kanbara instinctively goes to save his fellow schoolmate, Mirai Kuriyama from committing suicide. Following his pleads however, Mirai suddenly stabs Akihito with a sword formed out of her own blood and is shocked to discover that Akihito is an immortal "Half-Youmu"—the offspring of a supernatural creature called a Youmu and a human. After learning that Mirai is a Spirit World Warrior and the last surviving member of her Spirit-Hunting clan, their lives become intertwined as Akihito seeks to help Mirai gain the confidence to kill Youmu so that she may stop attempting to kill him as practice.

Official

 * Official Light Novel Website (Japanese)
 * Official Anime Website (In Japanese)

Other Sources

 * Beyond the Boundary (Wikipedia)
 * Beyond the Boundary (Anime News Network)