Beyond The Boundary - The Complete Season Collection Blu-Ray   Crunchyroll

All 12 episodes from the Japanese anime series directed by Taichi Ishidate.
The series follows the story of high school student Akihito Kanbara (voice of Kenn) who, preparing to commit suicide, spots fellow student Mirai Kuriyama (Risa Taneda) about to jump off the top of a building.
As Akihito instinctively saves Mirai from her fate, he discovers that she is actually immortal and is half human, half youmu.
The episodes are: 'Carmine', 'Ultramarine', 'Moonlight Purple', 'Bitter Orange', 'Chartreuse Light', 'Shocking Pink', 'Color of Clouds', 'Calming Gold', 'Silver Bamboo', 'White World', 'Black World' and 'Grey World'.