水道設備の会社の営業として働く俺はうだつの上がらない毎日を送っている。そんなやる気も起きない日々を過ごしていたある日、上司に「元気を出す為に現場仕事をしてこい」と言われ作業員になるコトに。嫌々ながら指示された家の水道修理に向かうと、現れたのは美人妻・奈々だった…。奈々は一見、花蓮でおしとやかな女性だったのが、あろうことかその胸元は隙だらけで…！？

I work as a salesperson for a plumbing company, and I'm living a pretty dull life. One day, feeling unmotivated, my boss told me to "go do some fieldwork to cheer myself up," so I reluctantly became a worker. I headed to the house I was assigned to repair the plumbing, only to find that the person who showed up was the beautiful wife, Nana… At first glance, Nana seemed like a demure and elegant woman, but to my surprise, her chest was completely exposed…!?