Fūfu kōkan: Shigeki ni ueta kyonyū-zuma

Original title: 夫婦交換 刺激に飢えた巨乳妻

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...