Kite (Original Japanese Version) - 2015

She may seem innocent and naive, but don't be stupid. She's a cold-blooded killer, and if you're on the wrong side of the law, you may be her next target. After being orphaned at a young age by her parents' murder, Sawa was taken in by the detective assigned to her case. Not content to just watch as the justice system let criminals go free, he's decided to train her to be his instrument of justice.