Machiko Hisada, a full-time housewife, is asked by her best friend Miho Sakai to help her with her work for a while. However, Machiko's husband Shigeo has been against her working ever since they got married. So she decides to work in secret from her husband since it's only for a short time. She sees her husband off as usual, and then she gets ready to go out. Then, she gets on the commuter train for the first time in a while. There, she happens to encounter a groper for the first time in a while.

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