During the relentless heatwave of midsummer, I found myself unable to work due to a bad back and was spending time alone with my son's wife, Nao-san. She was too kind, beautiful, and glamorous for my ordinary salaryman son, and I couldn't take my eyes off her. One day, Nao-san suddenly approached me with a smug smile. Unable to move because of my back pain, she handled my body like a toy, grinding her hips relentlessly as if she had turned into someone else…
