All 4 episodes There is a small village in the valley. A girl there hung herself in an old classroom. Her name was Kaede Mizushima. Before the incident, she entrusted her childhood friend Aoi Takahashi to her. She opened her heart to him. Her pouting face still remains in Aoi's memory, along with her laughter and everything they did together, their bodies pressed closely together. Aoi recalls the events that made him suspicious. Aoi firmly believes someone killed Kaede, so he takes action right away. One day, when Aoi is alone in the classroom thinking about his thoughts, a mysterious transfer student, Minazuki Ajisai, calls out to him...