三姉妹の三女・久美が結婚して大阪に出て行って3年、両親が定年後に農業を始めると言って九州に出て10年。実家に取り残された長女・舞香と次女・ひとみは、男に恵まれず平凡で慎ましい日々を送っていた。そんなある日、久美の出産を機に久美の旦那・篤史と一緒に暮らす事になった。久しぶりに若い男と生活する舞香とひとみは、あらぬ期待に胸を膨らませながら快く迎えたのだった。そしてその晩、欲望を抑えられない二人は…。 Three years have passed since Kumi, the youngest of three sisters, got married and moved to Osaka, and ten years have passed since their parents moved to Kyushu to start farming after retirement. The eldest sister, Maika, and the second eldest sister, Hitomi, who were left behind at home, were living ordinary, modest lives, having had no luck with men. Then one day, with Kumi's birth, they came to live with Kumi's husband, Atsushi. Maika and Hitomi, who hadn't lived with a young man in a long time, welcomed him with excitement and anticipation. And that night, unable to control their desires, the two of them… –
