After learning that her beloved daughter Mai, whom she raised single-handedly, was being bullied, Saeko consulted with her homeroom teacher, Sugura, but there was no sign of resolution. When Saeko went to the school to consult, she was urged by the grade master to visit Sugura. However, Sugura only made excuses reluctantly, and nothing was resolved. When Saeko said she would go to the school directly, Sugura became furious...