OYC-134 Amateur Male-Female Observation! Monitoring AV Brother-Sister Love Thoroughly Verified!! Normally, they would never talk about "first experience" or "erogenous zones." The brother extracts these answers from his sister, and if she can answer, he g

This time's amateur male-female observation is... thoroughly verifying sibling love! Close-knit siblings challenge a thrilling erotic interview survey! Topics that siblings would never discuss, such as 'first sexual experience' or 'erogenous zones,' with the brother extracting information from the sister and the sister answering to win prize money! As the content becomes increasingly explicit, the brother gets an erection upon seeing his sister's feminine face. The brother's arousal reaches its peak with the sister's 'vibrator impressions' and 'intramural ejaculation impressions.' Can he suppress his arousal until the end to win the prize money? Or will he cross the forbidden line? What will happen?