On a record-breaking hot summer day, after hurting my right shoulder during volleyball practice, I decided to get a massage from my friend's mother, Mariko. From the first time I met her, I had a faint crush on her, who exuded adult sexiness, but I knew it would never come true. I was receiving the massage with these thoughts in my heart, but when Mariko straddled me, I got an erection. As if she could see through my desires, Mariko approached me with a seductive smile on her face...