Naho Hazuki, struggling to get along with her husband's children, finds herself subjected to strict discipline by her stepsons. This "education" involves increasingly intimate acts—masturbation, handjob, bukkake/facial, and cleanup blowjob—pushing her boundaries in every way. Initially trying to maintain control, Naho gradually becomes emotionally dependent on her stepsons. As her feelings deepen, she is forced to confront her own desires and the complex emotions arising from this forbidden relationship.