Emi, 26 years old, was originally a long-distance runner on track and field. - She is now married and works as a gym instructor. - There, a young photographer offers to become a model for a photobook of muscular girls, and the two of them decide to shoot together! - ! - Alone in a small space with a married woman with a sweaty, oil-covered muscular body in tight clothing, nothing can happen... Please enjoy the muscle wife and foolishness who fall into strangers' sticks with acrobatic muscle fuck using training equipment! - !