しがないサラリーマンの滝本は徹夜の残業明けに朝勃ちを清掃員の唯井さんに見られてしまう。社内では空気のような存在の唯井さんだったが、作業着越しに見えるたわわなカラダに興奮した滝本は思わず襲い掛かり…。地味なルックスとは裏腹に欲求不満ですぐ中出しさせてくれて、しかも名器な清掃員さんと就業中にハメまくる！
After working an all-nighter, Takimoto, a humble office worker, gets his morning erection seen by Mr. Yui, a cleaning worker. Mr. Yui is a calm person in the company, but Takimoto is excited by the sight of his bulky body visible through his work clothes, and he can’t help but pounce on her… Contrary to her plain looks, she gets frustrated and lets me cum right away, and what’s more, she fucks with the famous cleaning staff while she’s at work!

– JavGG.net