Light Novel Kyoukai no kanata by Nagomu Torii

[NovelcornerITA]

Genre: Mistery, adventure, supernatural
By: Nagomu Torii
Art By: Chise Kamoi
Publisher: Kyoto Animation

The story of Kyoukai no Kanata is set in a world where creatures from the spirit world called Youmu (妖夢, lit., "catastrophic dream") roam in the human world under human guises, and trained specialists called Spirit World Warriors (異界士, Ikaishi) protect humans from Youmu attacks.

Akihito Kanbara is a high school student who apparently has a Youmu lineage and a peculiar regenerative ability that exceeds that of a normal human's. In an unexpected encounter, Akihito saves a classmate named Mirai Kuriyama, who was about to jump off the school building not knowing that Mirai is a Spirit Warrior. Mirai who was sent to killed Akihito failed because of Akihito's immortal blood. After their first encounter, Akihito started to help Mirai because he thinks that they're on the same foot. Akihito and Mirai developed their friendship together with Mitsuki Nase and Hiroomi Nase. Their friendship went under different trials that made their bonds stronger and the relationship between Mirai and Akihito grew deeper.

Sacrifices and great decisions were made by Mirai and Akihito. Decisions that might let them live without the person they wanted to protect the most.