Aida Yu

The Edo period has ended, and former samurai Haruyasu is adrift in a strange new world. Not even the promise of rebellion can cure him of his desire for death. But after an assassination gone wrong, Haruyasu finds himself at the mercy of his intended victim's bodyguard, an intriguing young woman with the power to heal–so intriguing, in fact, that he decides he wants to live in order to learn more about her. But what will she ask in return for saving his life?

The manga's story centers around Sachi Maruyama, a girl who has just entered high school. In her new school, she finds that no club activities really interest her, so she is invited by an upperclassman from her middle school — now the student council president of her high school — to help with student council activities. There, she finds Karasuya, a boy she had met three years ago on a baseball field. \[ANN] Wikipedia

Henrietta barely survived a brutal attack that killed her family. 'Rescued' by the Social Welfare Agency, her injuries were repaired with robotic components and she was brainwashed. Lost with the memory of her family's deaths was almost every trace of her own humanity. Now, she is an extraordinarily lethal cyborg assassin, obediently working with her handler Giuseppe to carry out her deadly tasks. Despite her conditioning and programming, Henrietta still has the heart of a young girl. She has not completely forgotten how to love, yet the very emotion is contrary to her training and programming. Can the Gunslinger Girl survive? Can she find peace in a struggle against her very nature?