The top salesman in the company, Kusakabe, is a very popular man. One day, due to a misunderstanding at work, he ends up spending the night at a hotel on a business trip in the same room as his coworker, Yuu, a woman known for always having a blank expression. While she didn't look friendly, she was good at her work which was one of the reasons why Kusakabe always secretly had feelings for her. That night at the hotel, he decided to tell her how he really felt, breaking her iron mask and causing her to blush. But the unexpected reaction only made him even more excited and unable to supress his desires any longer. This is the passionate love story between a top salesman and his seemingly unfriendly coworker.