Sawa is a school girl, an orphan, and an assassin. She is being controlled by a corrupt cop who gives her targets to kill, detailing to her the crimes these men have committed in order to justify their death. Some of his power over Sawa has to do with her deceased parents and the promise of revenge. When another orphan, a teenage boy called Oburi, is brought in to assist Sawa, the two teenage killers form a bond of sorts. As they heal each other's emotional wounds, they begin to dream of a life that would not be spent under the shadows of murder.
Years after the events that transpired in Kite, Sawa's whereabouts are a mystery. During this time, rumors of a new killer have begun to circulate the city. They call her the Angel of Death, an unfeeling assassin who eliminates her targets with grace and precision, leaving only a flurry of feathers as her calling card. What the public is unaware of is the fact that this notorious hitman is a actually a polite young lady named Monaka. Like her spiritual predecessor, Monaka has lost most of her family, and her father's duty as an astronaut keeps hims practically worlds apart. However, they are close despite the physical distances and Orudo promised his daughter that he would return. Until then, daily life for the timid and somewhat clumsy Monaka involves mostly school and her part time job as a waitress, but her nature completely changes once she receives an assignment.