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Overview:

Husband is happy and sad about the rise and fall of stock prices, and has lost interest in his wife, resulting in a sexless marriage. The wife has no choice but to masturbate every night. Her recent favorite is masturbating with a cucumber as a vibrator. The bored wife has started attending a class on writing tanka in colloquial style, which has become popular due to the "Salad Anniversary". The instructor is a student from the Faculty of Literature at the University of Tokyo, and is a virgin. He blushes as he criticizes the erotic tanka that the housewives write. The housewives find it cute and end up competing with each other to take his virginity. One day, a housewife who masturbates a lot ends up writing a tanka about her impressions of masturbating with a cucumber. A student of the instructor becomes interested in the tanka and breaks into her home...