Shuriken and Pleats Vol. 1 (manga)

With the Meiji Restoration and the abolishment of the Samurai system, the once feared and respected ninja were forced underground, to continue their work in absolute secrecy. In modern times, the descendants of a certain ninja clan have continued their ancestors' legacy by employing the ninja arts in their work as bodyguards for the rich and famous. Kirio Mikage is the daughter of the CEO of "Shadow Village Company," a private security company that operates as a front for the clan's ninja activities. For as long as she can remember, her father has been training her physically and mentally to be a ninja, drilling their clan's mantra into her head: "Be a shadow." Ever since she was a child, Mikage's only source of comfort and encouragement has been her employer, James G Rod. Rod is a kind, handsome and mysterious British businessman who is using Shadow Village Company's ninjas for his personal security and who, when Mikage was only about 10 years old, requested that she be assigned to complete her apprenticeship as part of his security team. His wife, whom he loved dearly, was Japanese but she and the couple's daughter were killed by Rod's enemies prior to him hiring Shadow Village Company to see to his personal security. When the master she has sworn to protect is killed, Mikage Kirio, the skilled ninja, travels to Japan to start a new, peaceful life for herself. But as soon as she arrives, she finds herself fighting to protect the life of Mahito Wakashimatsu, a man who is under attack by a band of ninja. From that time on, Mikage is drawn deeper into the machinations of his powerful family.