Seven years after reuniting with her uncle, Ena ends up living with him for several days. Going through puberty, she's blossoming physically and feels self-conscious about her big tits. There's a certain "secret" caused by her large breasts that she never wants anyone to see. But her uncle soon notices, and their relationship takes a sudden turn. Gradually, he becomes drawn to her voluptuous chest, while Ena starts awakening to her own sexuality. Will she finally learn to love her big boobs? A soft, melting incest story between a mischievous schoolgirl and her uncle.