Chikan densha: Shinobi yubi wa yume kibun

痴漢電車　しのび指は夢気分

Also known as 痴漢車両　丸出し姉妹, Chikan sharyô: Marudashi shimai

The elder sister of the Tsuboi sisters, Chiaki, is a shy and unemployed woman, and her younger sister, Konatsu, worries about her. Meanwhile, Konatsu is a flamboyant and headstrong woman who works as a flyer model. The two of them then enter a crowded train...