Shin Nitta is suddenly crushed with debt, but his loan agent tells him he can be freed of the debt if he keeps a certain woman "company". Over time, he learns that doing so is not as easy as he thought.
The relationship between Shin Nitta and Kanoko starts out badly. As Nitta only sees Kanoko as a spoiled brat who can't care less about anyone but herself, he initially just runs errands to keep Kanoko satisfied at a bare minimum. As time passes, Nitta soon discovers the aspects of Kanoko's life that led to her self-centered isolation: Kanoko's stepmother/aunt caused her mother's death as well as her father's illness during the series. It was also Kanoko's aunt who caused Nitta's 80 million-yen debt and set up the companionship, ultimately to discredit Kanoko within her father's company.
By the end of the series, Kanoko and Nitta have both fallen in love with each other. However, since Kanoko has taken over her father's company, she cannot be with Nitta as they both agree that Kanoko has to focus on her new responsibility. Three and a half years later, Nitta has started a new job and Kanoko has taken over her father's company. Her aunt has since been arrested for her crimes. Nitta and Kanoko reunite only to find that Kanoko has to travel overseas to expand the business. Kanoko asks Nitta to come abroad with her but he refuses, claiming his place is in Japan and he is just beginning his career at his new job. They part ways, promising to wait for each other as Kanoko says "see you later" to Nitta.