Crimson Blade: The Beginning

There was once a secret society of assassins called Black Death. A single girl, Saya Akatsuki, one of their best assassins, known as Crimson Death had disappeared and hasn't been heard of since her final mission was left unfinished. Unable to find her, the organization gave up, but as we all know, secrets cannot be kept forever. Two years later, the arrival of two new students at an academy stirs up old secrets and the game of cat and mouse is to begin once again.