DARKER THAN BLACK: Kuro no Keiyakusha

A phenomenon called Hell's Gate appeared in Tokyo ten years ago, causing the night sky to change and granting certain individuals supernatural abilities, known as Contractors. These individuals are emotionless and lethal. Kana Shinoh, a high school student still grieving her father's death, remains unaware of these events until she sees him in the street. Convinced he is alive, she begins searching for him, drawing dangerous attention. She is saved by Hei, a top Contractor in Tokyo. Though indifferent to her plight, he agrees to protect her. Kana must decide how much to trust Hei, known as the Black Reaper.