Her husband is swamped with work and rarely comes home, leaving Hinako's sexual desires at their peak. One day, she catches her father-in-law napping with an erection. Unable to resist the sight of his impressive manhood, the pacifier-addicted Hinako crosses the line, succumbing to temptation. Desperate for a child, she even begs her father-in-law to impregnate her in her husband's stead... .