Kite (1998 film)
Plot
Young schoolgirl Sawa is orphaned in her early teens following the gruesome murder of her parents. She goes on a date with a celebrity, during which he angrily confronts an elderly woman who had admonished him for dating such a young girl. Sawa kills him, and the woman dies of a heart attack while feeling around for her glasses in the bloody aftermath. Sawa's legal guardians, Akai and Kanie, are the detectives investigating the crime. Akai has engaged in a sexual relationship with Sawa for the duration of his guardianship and has gifted her a pair of crystal earrings, allegedly containing the blood of her parents.
Plot
Akai and Kanie train Sawa to become an assassin; over the years, she kills whomever they order her to, including corrupt police officers and corporate fat cats. Sawa's murders are infamous among police for her use of special bullets that explode inside the body after piercing the skin.
Plot
Eventually, Sawa meets fellow assassin Oburi, who is around her age, and quickly befriends him. Inspired by Oburi, Sawa gains the confidence to escape her guardians and set out on her own. Oburi resigns from Akai and Kanie's employment after killing three more targets, but Akai orders Sawa to kill Oburi before he can. Oburi confides to Sawa that Akai and Kanie were the ones behind the murders of her parents, but Sawa admits she has known this for years.