A brother moves in with his older brother's family to study for exams. Initially appearing serious, the sister-in-law's intense gaze on a man's genitals during a conversation in the bathroom after borrowing the bath leads the brother to gradually feel a sense of unease. That night, the sister-in-law enters the sleeping brother's room, shaking her voluptuous buttocks. She suggestively sucks on the sleeping brother's penis. Since then, the sister-in-law has repeatedly engaged in nightly sexual acts... Note: The recorded content may vary depending on the distribution method.
