My Love Beyond the Veil

Hina walks home from school with her friends when a major car accident unfolds before them. Only Hina can see Lior, a silver-haired boy her age with golden eyes, a black cloak, and a scythe, standing amid the wreckage. He collects the dead, and he does it with a scythe. Hina believes Akio is her childhood friend, but the truth is that Akio is an angel who revived her after a middle-school car accident killed her parents. He stayed on Earth to watch over her.