The fate of a girl with big breasts is a sad one. When she was little, boys made fun of her, and in middle school, all the men who approached her were only interested in her body. As a result, she was no longer able to trust men, and when she married a man she could trust, she grew old in a sexless marriage, wasting her big breasts, and suffering from stiff shoulders and sexual frustration. Jun-san is lucky, since it's thanks to her perverted husband that she's been able to be used as a sex slave like this.