It's been three years since Kumi, the youngest of three sisters, got married and moved to Osaka, and 10 years since her parents moved to Kyushu, saying they would start farming after retirement. Maika, the eldest sister, and Hitomi, the second sister, who were left behind at home, lived ordinary, modest lives without any luck with men. Then, one day, Kumi gave birth and they decided to live with Atsushi, Kumi's husband. It had been a long time since Maika and Hitomi had lived with a young man, and they welcomed him with unexpected hopes. And that night, the two could not suppress their desires...