Rie Takahashi, a 57-year-old married woman, is the protagonist of this story. Originally lively and energetic, she appeared happy living with her children. However, her husband, who once seemed attractive and charming, has since become an ordinary middle-aged man, making daily life dull and unexciting. Craving new stimulation, she began longing to relive the passionate feelings she experienced in her younger days. Driven by this desire, she responded to a recruitment ad she found on an adult website from her phone. Though she appears modest and serious at first glance, the fact that she actively applied herself clearly reveals her deeply lustful nature.