Recently, Ryo, a wife who feels that her husband does not see her as a woman, starts a business trip personal gym because she wants to turn her husband around. In the afternoon when her husband is not around, she has a private lesson once a week with Alex, a young black man. Ryo feels a man in Alex's strong body. On the other hand, Alex takes a liking to Ryo's lustrous body. One day, when I suddenly looked at Alex's body at the end of the gym, I saw that his pants were so erect that he could tear off.