Recently, his wife, Ryo, who feels that her husband has not seen her as a woman, starts a business trip type personal gym to turn her husband around. In the afternoon without a husband, a private lesson once a week with a young black man, Alex. You can feel a man in Alex's strong body. On the other hand, Alex likes Ryo's lustrous body. One day, when I suddenly saw Alex's body at the end of the gym, he had an erection so much that his pants were torn off.