On her way home after mailing a letter expressing her feelings for her brother, Aoi runs into him returning to their hometown. Her feelings have built up over three years, and she wants to convey her racing emotions... "I've always loved you, big brother!" The forbidden love between the devoted little sister Aoi and her brother. As they embrace, she gradually awakens to pleasure. Their sibling bond deepens as they repeatedly creampie and indulge in their carnal desires...