This is the second work by the 50-year-old beautiful mature woman , Yumi Anno, who has moved to Madonna and is currently an exclusive actress! It has been 20 years since she got married to Hiroshi through an arranged marriage. With her son also leaving home, Yumi and Hiroshi were living an ordinary life together. 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 hold a small party at their house, inviting Hiroshi's classmates, but a tragedy befalls Yumi. Oki happens to see the scene of the tragedy...