Yumiko had a secret that she absolutely had to keep hidden. Physical relationship with her student. It was such an exciting time for Yumiko that she would risk her life as a teacher if she found out, but she would become absorbed in it. However, recently, her students have been pressing for relationships at school in search of further stimulation. Too dangerous. Her reason tells her so. However, Yumiko's escalating desire could not suppress her urge to seek thrills.
