Kuki Reiko is a single 27-year-old. who works in the accounting department of a mid-size toy manufacturer. An incident from her past makes her live a frugal life, only buying the necessities. A year ago, she found small dishes at a secondhand store that liked immediately. Since then, she has been returning to that shop, still debating whether to buy them or not. Finally, when she decides to make the 1680 yen ($15 ) purchase., she enters the secondhand store with great anticipation, only to have it dashed when she sees a couple buying the small dishes on a whim. Imagine her surprise when she recognizes Saruwatari Keita, her boss‘s son! A few days later, Reiko goes to work and only to find Keita in the accounting department. His father got angry at his wastefulness and sent him there to learn the value of money. As the frugal Reiko is best-suited to teach him, he will find himself an apt student. But will her advice be just about money?