Sugawara Yuga is a sales representative at the medical IT company Imuta Medical Data. Believing that the company was responsible for driving his older brother to death, he joins the firm with a hidden agenda. Outwardly, he seems cheerful and easygoing, but behind the scenes, he’s secretly acting as a spy, collecting evidence to uncover the truth. However, his plans take an unexpected turn when he falls for Imuta Hana, the company president’s daughter, whom he initially approached only to gather information. Caught between his desire for revenge and his growing feelings, Sugawara begins to question his true intentions.