Konatsu Kashiwagi, raised in a single-mother household without ever knowing her father, has always harbored a deep fascination for older men. In her second year of middle school, still inexperienced with men, her first act of masturbation became a pivotal moment in her life. When a male teacher visits her home for career guidance, and with her mother absent, an adult relationship begins to develop. This story captures the natural progression as Konatsu's long-held fantasies gradually transform into reality.