Kunoichi Torture and Rape Ninja Book: Blue-Eyed Maria, Shura Hime who fell mad

There was a hidden truth that was not told in history. The kunoichi's name is the blue-eyed Maria Shurahime. It is said that Maria was able to grasp the ``heart''. And in modern times, there was an organization that focused on this ability. The story begins with the organization tracking Maria.