This is the second exclusive work for 50-year-old beautiful mature woman, Yumi Yasuno, who has moved to Madonna! It's been 20 years since she married Hiroshi through an arranged marriage. With her son also leaving home, Yumi and Hiroshi were living an ordinary life together. Then, one day, she receives news that her husband's best friend, Oki, who had been working overseas for a long time, has returned to Japan. They decide to invite Hiroshi's classmates to a small party at their house, but a tragedy befalls Yumi. Oki happens to see the scene of the tragedy...