Every time I see my older sister, my heart races and I get caught up in masturbation. But my uncontrollable desire keeps growing, until I finally resolve to sneak into her house. Mesmerized by her vulnerable sleeping form, I first caress her breasts, captivated by their warmth, then gradually move my hand toward her groin. I guide my throbbing cock deep into her wet heat, deepening our forbidden relationship. This work is packed with repressed passion, featuring six scenes of sleeping lessons.