Fūfu kōkan: Shigeki ni ueta kyonyū-zuma

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The Harada and Ito families are two couples living in separate houses. Harada Tetsuo and Ito Ryuta are boss and subordinate at work. Their wives, Nanase and Ayano, are both dissatisfied with their husbands' sex lives. So they come up with the idea of ​​swapping husbands...