The older brother targets his younger sister's body, who has recently become strangely mature, and plants sleeping pills in her. After she drinks coffee milk and is overcome by a strong feeling of sleepiness, the brother, who has become a beast, bares his fangs at her! He dresses her in a school swimsuit, takes obscene photos, smears lotion all over her, strokes her with his slender legs, and rubs his dick all over her body... He does whatever he wants to the defenseless younger sister!