"Is Nao alone?" After a long time of returning home, a long time of reunion summer vacation, a girl uncle who is looking forward to spending time with her favorite uncle also ● Sleeping too dazzling looking forward to the growth of her niece who became a school student・ Open chest ... Feeling'woman'to her niece taking a nap, her uncle just touches her ... Tempts her childhood friend. And sex ... With various summer experiences, Nao grows rapidly from a girl to an adult'woman'.