170cm tall, the aunt was once an active volleyball player in her youth. She still plays in a mothers' volleyball team and enjoys daily exercise. Because of this, she lacks femininity and exudes more sportsmanship than sensuality. However, while wearing her tracksuit, her figure remains hidden, surprisingly revealing a great physique. This aunt is spotted by a young coach who then forces her into sports massage. The highlight lies in her reactions, and how their relationship gradually transforms.