The story revolves around a man and a woman who have had the worst breakup in their lives and are now rivals in sales performance.

Shirafuji Nao and Kurose Takahito joined a web advertising company at the same time and often exchange abusive words and compete in sales every day. Actually, Nao and Kurose were a couple back in high school but they broke up in a very bad way due to the words used by Kurose at that time. Nao was traumatised by those words and is unable to experience new love since then. One day, Nao and Kurose team up together reluctantly to participate in a large scale competition. Although they continue to fight and complain, the time spent together increases and slowly their relationship starts to change after 7 years.