His Greatest Atonement (Byakuya Kuchiki Fanfic)

Before Rukia, there was a girl named Akane, the shining young prodigy of the Kuchiki Clan. She was worth more than what she thought. All she knew was that she was Byakuya's precious little sister and she wanted to stay that way. But little did anyone know that darkness was lurking between them, shattering the bond they once had.