Aoki, mountains, blue sky. In a small town in a certain prefecture where the rural landscape of Japan spreads out, the child lived. Narumi, a pure-hearted girl who knows nothing about the city, yet her words betray a longing for the city. Such an innocent girl is deceived and taken to Tokyo to appear in an AV! The rough hands of a man begin to grope the firm, young breasts that have grown full on the girl, and helplessly, she is thrust into her first pleasure! The first time she takes in an adult man's large penis... she swallows it to the back of her throat while tears well up! A summer when a simple and innocent girl is tainted by the colors of the city, her first experience with internal ejaculation!