Miki Yoshii is a milf whose husband no longer satisfies her, leaving her emotionally unfulfilled. She tries to cope by pleasing herself, but still feels something is missing. She decides to start yoga, hoping physical movement will release her pent-up emotions. Soon, her son begins helping her with the poses. His eyes linger on her sweating body, and he gradually becomes aroused. One night, she has sex with her husband for the first time in a while, but again finds no satisfaction. The next day, she resumes yoga—just as her son walks in. Seeing him, his crotch slowly begins to swell. Miki notices... and finally gives in.