Nagase, with her delicate facial features and beauty, appears charming at first glance, yet carries an air of insecurity. She developed distrust toward men due to an incident that occurred during her teenage years. Although this distrust gradually faded and she eventually got married, she remained unable to become sexually proactive. Lately, while listening to intimate stories from her mom friends, she became aware of her own lack of knowledge, sparking both embarrassment and intense curiosity. Through this performance, she experiences pleasures unlike anything she's ever known, deepening her desire to explore her own sexuality.