Recently, my wife, who is obsessed with dieting, was watching a certain video and stretching. The female trainer shown on the video sharing site is a slender beauty named Himari, who apparently runs a personal gym in Tokyo. A few days later, I started going to Himari's gym with my wife. During the training, we felt strangely close to each other, and I couldn't contain my excitement at her toned body. Then, Himari asked me if I wanted to take a one-on-one lesson without telling my wife...