Living a busy life with a husband who's a company president, Ayumi Shinoda rarely has sex—only once every two or three months. Deep down, she feels lonely, yet she's unable to express her true emotions, just like so many women. Then she meets a man for the first time, and is swept away by his intense passion. At 35 years old, with her I-cup breasts swaying, she repeatedly reaches climax through BDSM play, gradually freeing herself. What she seeks isn't just sex, but emotional fulfillment and physical pleasure. Through this new relationship, she experiences unprecedented ecstasy.