Assasin Mizuki got reported that suspicious organization making human experiments. She sneak to the organizations lair to find out the truth, but suddenly got knocked out and captured. When she wakes up she found herself in an odd chair, even before she had time to figure out what was happening, a strange helmet was put on her. She realized what's happening, but it's too late. Brainwash program started and her personality was gone forever. From now on she's just a mindless sex doll that obeys any order of the organization.