Mienai Kao

One day, Onozuka Miki receives a call from her older sister, Tatebayashi Midori, from whom she was separated years ago. Midori desperately begs for her help, afraid that a killer is after her life! Miki quickly transfers schools to Midori's posh private boarding school, but not two days pass before she is swept into a whirlwind of unexplainable murders...