Our story begins as Noriko, a recent liberal arts grad, arrives at a branch office of the Asagake Newspaper to start her career as a journalist. With the help of her overbearing and math-minded boss Kakeru, she's finally able to do some real reporting. But Noriko soon discovers the mathematical functions behind all the stories she struggles to cover. Using real-world examples like probability, supply and demand, polluting companies, and shochu density, Kakeru explains to Noriko: Techniques of differentiation and integration How to integrate and differentiate trigonometric and other complicated functions Multivariate calculus and partial differentiation Taylor expansions