Shiraha has long harbored a secret love for her childhood friend, Akaishi, but fears that confessing would ruin their close bond. Her life takes a dark turn when she is caught in a compromising moment by her teacher, Kuroki-sensei, who uses blackmail to force her into a traumatic sexual encounter. Desperate to protect her relationship with Akaishi and prevent him from finding out, Shiraha submits to the abuse, leaving her emotionally shattered.