My wife, who has recently gained weight and is fussy about dieting, was watching a video and stretching. - The female trainer uploaded to the video posting site is named Yuu, and appears to be opening a personal gym in Tokyo. - A few days later, my wife and I decided to try out Yuu's personal gym. - He was kind to me during training, but when I was there, he was strangely close to me. - Then, in a whisper that my wife couldn't hear, I was invited to take one-on-one lessons...