Misao Narita (Ai Mikami), an employee of a trading company, despises her high performer colleague from the same department, Kazuya Ichikawa (Taiki Sato), for his brutally blunt nature. However, a turn of events leads to Misao developing feelings for Ichikawa. Meanwhile, Ichikawa also falls for Misao who happens to be a quick learner and good at her job, and straightforward about her feelings. The two eventually engage in a physical relationship.
However, Ichikawa starts dating another woman, Yuko Tadokoro (Umika Kawashima), on the premise of marriage.
Misao, all confused while thinking, “how on earth can he be with someone and hold me?” continues her “forbidden love” with Ichikawa, despite knowing he is cheating on his girlfriend.
Misao and Ichikawa gradually grow apart. What will be the fate of these two, who are involved physically but have no emotional connection whatsoever…?
Half-concealed words, and slick tricks…All men and women are moody!
This story is a love story with a new sense that unfolds from both a male and female perspective.

新人上班族的成田美纱绪非常讨厌一个部门的冷漠前辈市川。可是经过一次不经意工作的交集，从邮件往来开始，慢慢的开始在意对方的存在了…。
装腔作势的语言，微妙的讨价还价，可是等过之后的剧情进展却是，市川拿着成田的照片在显摆的笑容。