Yui, a big-breasted girl raised and protected in Tokyo by her parents, had returned to her paternal hometown for a grave visit. During her stay, one day when her father went to a friend's house leaving Yui behind, she saw her uncle sleeping on the veranda with an erection due to a mere physiological response. Knowing nothing about sex, Yui found it curious and out of interest touched his crotch, masturbating him to ejaculation. Since then, the rumor that 'Yui is a lewd girl' spread among her uncles, and she became their target...
