Kiri: Shokugyô Koroshiya

Kiri was trained as a professional assassin. She carries out missions given by her boss. She has Rui, whom she adores like a real younger sister. Rui was also trained as a professional assassin with Kiri. A horrific incident leads to the death of Kiri's mother and Rui losing her voice and right hand. Kiri swears to exact revenge.