Yurie Matsushima & Eriko Miura acting together for the first time! The eldest son of the Oshima family, Yoshiyuki, and his wife, Yurie. Second son, Kei and his wife, Eriko. According to custom, these two couples only returned to their husband's birthplace on the death anniversary of Toshizo, the head of the Oshima family. Burn incense in front of Toshizo's Buddha altar and talk with Mitsuo, the third son of the Oshima family... This year is no different from the Oshima family's usual summer scene. However, Mitsuo is different. Mitsuo had a plan... A plan that would push his two sisters-in-law into despair...