"Would you agree to a lover's contract with me?" Hikari Nakasawa works in the sales department of her company... and has secretly been infatuated with her boss Mr. Irie, a married man. One day, Hikari finds him looking troubled on the phone... and after taking advantage of the situation, the two sleep together. However, upon leaving the hotel, they happen to be spotted by Suguru Aoyama... a coworker of Hikari's! To keep his mouth shut, Aoyama proposes that Hikari becomes his "fake lover"... what choice does she have? At the same time, Aoyama seems to have some love life matters of his own going on...?!