Sari, a married woman who can't abandon her femininity, lied to her husband and went on a hot spring trip with her lover, Eiyu. Worried that she might get caught by her husband, she still indulged in sex driven by love and instinct. She was penetrated from morning till night by intense, passionate sex and a powerful penis different from her husband's, making her forget her love for him... Three forbidden days driven by lust that she couldn't tell anyone about.
