Innocent Assassin: Sakura Bianchi Book 1

A home invasion and brutal gang rape leaves young Sakura Bianchi fighting for her life and her mother is killed. The gang members are never found by the authorities or brought to justice. With the resources of the Yakuza behind her, Sakura trains to become an assassin and then tracks down all five men to avenge the death of her mother. Each man is made to suffer terribly for the atrocities they inflicted on Sakura and her mother that dreadful night.