Yurie Matsushima & Eriko Miura first-time paired together in Mature Woman in her 40's. Yoshiyuki, the oldest son of the Oshima family, and his wife Yurie. Kei, the second oldest son, and his wife Eriko. These two couples customary visit the husbands' first home on the death anniversary of Toshizo, the master of the Oshima family. They offer some incense sticks to Toshizo's Buddhist alter, include Mitsuo, the third son, and enjoy chatting with each other. They spent their summer at the house of Oshima family in a usual manner this year, except Mitsuo. He was up to a plot... The plot to drive two of his sisters-in-law to despair.... My Sister-in-Law Her Heart Was Stolen at Her Husband's Parents House By Her Beautiful Sister-in-Law Yurie Matsushima Eriko Miura.