Darker than Black - S01

One night, as meteors streak across the star-studded sky, Shion Pavlichenko becomes a Contractor. Even after her brother's transformation, his twin sister Suou keeps living a fairly ordinary life, going to middle school with her friends and dealing with the awkwardness of growing up. But everything changes when a masked man in black invades her home, shattering the normal life she once knew. It turns out Suou has latent Contractor abilities of her own, and she finds herself torn between family, friends, and her own sense of purpose as she steps into the ruthless world of cutthroats and espionage that Contractors call home. Meanwhile in Tokyo, an investigation into the sudden collapse of Hell's Gate is underway, and prophetic signs of doom point toward a silver-haired doll.