Yayoi lived an ordinary life, growing increasingly dissatisfied with her husband's indifference and selfish behavior. However, her life took a drastic turn when she accidentally discovered her son, Go, masturbating with her panties. In that moment, Go overpowered the resisting Yayoi and unexpectedly made her climax. Following this shocking encounter, Go began seeking out Yayoi behind her husband's back. Though initially forced, their relationship gradually deepened into something far more intimate. As Yayoi continued to harbor resentment toward her husband, she found herself developing new, intense feelings for Go. Their bond soon evolved into a depraved and shocking series of illicit affairs.