Recently, my wife, who is strict about dieting, seems to be hooked on a certain video. The female trainer in the video, titled "Lose weight in 10 minutes!", is said to be Hibiki, and she seems to run a personal gym in Tokyo. A few days later, my wife and I went to Hibiki's gym for a free trial. Hibiki was kind and polite in teaching us the training, but for some reason she was strangely close to us. Then, in a voice so quiet my wife couldn't hear, she asked if we wanted to take a lesson just the two of us...