Sanako Moriwaka (Mikako Tabe) is single and works in the accounting department of a soap company. For her job, she checks receipts and bills. Each slip that she reviews, mentions only the dollar amount and a brief reason for the expense. When Sanako Moriwaka reviews the slips, she can often discern suspicious facts surrounding the expense or even troubles in the lives of the employee.

After a painful breakup with her unfaithful coworker boyfriend, Maika teams up with her company’s new CEO, Shun, in a fake relationship to get revenge. With Shun looking to dodge an arranged engagement, their plan works for both—until hidden motives surface, sparking a deeper web of love, lies, and revenge.