While the husbands were away, three sets of mothers and their sons gathered at Reiko's parental home. As they drank and complained about their husbands, the conversation turned to their sons who lacked romantic interests. Worried about their future, the three women conspired on a "nephew deflowering plan"... As the alcohol took effect and the mothers became more seductive, each one went wild with her nephew in an orgy of sex and debauchery. The unrestrained sex of the lustful mothers assaulted the innocence of their nephews!!
