While their parents are away, Kotone finds herself alone with her attentive older brother, more attentive than usual. The 145cm petite beauty Kotone radiates the pure, innocent charm of an ideal little sister. Gazing intently at her brother, she takes bold actions throughout the house. Her slender, translucent white body reacts sensitively as she indulges in passionate lovemaking. Kotone honestly expresses her feelings: "Onii-chan belongs only to me. Fill me up inside completely◆." A day that deepens their intimate bond.