The story depicts an older brother obsessively watching his younger sister's developing body. He stares intently as she heads to school, uses the toilet, and bathes, completely infatuated. Overwhelmed by intense emotions, the brother can no longer suppress his uncontrollable sexual desire. In his dreams, he imagines her body, kissing her lips, sucking her cute breasts, and devouring her smooth, hairless slit. Without permission, he thrusts inside her delicate frame, violently pumping his cock until he's about to climax. At that moment, the sister screams, "What are you doing! Big brother!! Stop it!" Hearing her cry, the brother forcibly barges into her room and rams into her without consent, shooting his load deep inside. The sister endures his rampant lust in tears, her expression clearly wishing for this torment to end. Even if he's called a despicable brother, it's understandable. His relentless thrusts against her sorrowful face leave deep emotional scars on her heart.