Being stroked seductively on the buttocks and having her defenseless chest groped from behind... Rikako was experiencing her first case of groping. (Why, this auntie?) Rikako, who thought it was impossible for an auntie like herself to be groped, had let her guard down. That attitude had stimulated the groper. (If this continues... I can't stand it... I don't like it, in such a place...) If someone were to see her being groped and feeling it in such a crowded train... Embarrassment and fear paralyzed Rikako's body, which the groper's lewd fingers toyed with. Her body, which had been unsatisfied due to lack of sex with her husband, began to react sensitively...