During a record-breaking heatwave, I injured my right shoulder during volleyball practice and ended up asking my friend's mother, Mariko Sata, for a massage. Ever since I first met her, I'd sensed a mature, alluring charm about her. With those feelings in mind, I agreed to the massage, but when Mariko lay down beside me, I unintentionally got an erection. Seeing exactly what had happened, she gave a seductive smile and slowly moved closer to me...