"Auntie, what kind of education are you giving your son?" A family "sexually dominated" by their son's unfaithful girlfriend. (Tanihara Nozomi/Nagasaki Yukine DLDSS-530)

Hajime, the only son of a wealthy family, grew up under excessive protection. His mother, Nozomi, always worried that her son was somewhat unreliable, but one day, he announced he was bringing his girlfriend home. "Since it was her son who chose her, she must be a very gentle girl," Nozomi thought warmly, welcoming her over. However, his girlfriend, Yukine, completely exceeded her expectations. Her appearance and behavior could not be simply categorized as "modern young woman"... and she suddenly erupted in anger, yelling, "Auntie, what kind of sex education are you giving my son?!" And so, the family began to be subjected to sex education by their son's unconventional girlfriend...