Nephew Kazuya moves to Tokyo to prepare for his entrance exams and begins living with the Hojo family. Maki Hojo warmly welcomes him, but Kazuya, driven by strong sexual desire, has no interest in studying. Instead, he immediately asks her to teach him how to put on a condom. Naturally submissive, Maki cannot firmly refuse and ends up rolling the condom onto his erect penis as instructed. Overcome with excitement at the sensation of the condom, Kazuya trembles uncontrollably. Though Maki desperately tries to reason with him, her heart and body gradually give in to his aggressive advances and his youthful, powerful cock.