X-Kai-

X-Kai- is a shōjo manga by Asami Tohjoh. It was serialized in the manga magazine Eyes Comics, published by Homesha, and the chapters were collected into two tankōbon. X-Kai was licensed for release in English by Tokyopop.

Plot
During the day, Kaito works as a florist in a rundown flower shop, but he is actually an assassin trying to make enough money to care for his comatose older brother, who was badly burned in an accident. Kaito receives his assignments from a mysterious and beautiful woman named Suguru. However, although Kaito works as an assassin, he is not without compassion. Later on in the series, Kaito takes in a little boy he names Renge, who has been abused by his parents and other adults.

As the story progesses, more is revealed of Kaito's past. He and his older brother spent much of their childhood at an orphanage that trained young boys to be assassins, and Kaito's older brother was one of the people responsible for picking out the boys with the most potential. In the organization he works for, Kaito is considered to be the top assassin, which causes jealousy and resentment among his rivals.