A pure and adorable sister gradually becomes more affectionate toward her older brother. Trusting his words without question, she surrenders her body completely, a sight so touching it tightens the heart. She simply loves her big brother deeply, and in expressing that love, she grows increasingly sensual. The brother's sexual advances escalate day by day, and the sister responds in kind, progressively freeing herself. A sweet incestuous tale of siblings entwined in pure emotions and an uncontrollable relationship.