"Is Nao alone?" After a long absence, she returns home for the summer holidays, eager to spend time with her beloved uncle. The uncle also looks forward to seeing his niece grow up as a ● school student. Her dazzling sleeping figure, her open chest... The uncle feels 'woman' in his sleeping niece and can't help but reach out to her... He seduces his childhood friend and then has sex... Through various summer experiences, Nao rapidly grows from a girl into an adult 'woman'.
