Beautiful mature women in their 40s, Yurie Matsushima & Eriko Miura co-star for the first time! - Yoshiyuki, the eldest son of the Oshima family, and his wife, Yurie. - Second son Kei and wife Eriko. - It was customary for these two couples to return to their husband's birthplace on the anniversary of the death of Toshizo, the head of the Oshima family. - They lit incense at Toshizou's Buddhist altar and had a lively conversation with the third son of the Oshima family, Mitsuo...this year's summer scene at the Oshima family was the same as always. - However, Mitsuo was different. - Mitsuo was planning a plan... - A plan that plunges the two brothers' wives into despair...