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. Hinako is lucky, since it's thanks to her perverted husband that she's been able to be used as a sex slave like this.