My grandson Hiroki decided to visit his relative, Mr. and Mrs. Akai, during the summer vacation. Hiroki, who has longed for his aunt since childhood, can't contain his excitement. That night, I couldn't stand it and peeked at my aunt masturbating... Her aunt, who had noticed her gaze, saw that she had little experience with women and forced her to do so. This summer, Hiroki will have an experience that he will never forget.