Yumi, a veteran teacher, was deeply trusted by parents and relied upon by her superiors and colleagues. However, she had a serious secret that betrayed that trust. She had entered into a physical relationship with her student, Okamoto. She had been careful to keep it a secret from the school and everyone around her, but... Okamoto, still young and in the midst of puberty, had begun to crave stimulation. So, seeking new excitement, he started to play with Yumi's body during class...
