Yu is tired of housework and has a terrible backache. One day, her husband's friend comes to her house. The man was a dispatched masseuse and soon noticed Yu's back pain that her husband hadn't even noticed. A man who proposes a massage because it is difficult to break her waist. Her husband is also advised to undergo the procedure because of the apologies she did not notice. However, the man was aiming for Yu. Yu, who was touched by her harshness and raised her pleasure, accepts the man as she is swept away ....