Money that is "inevitable" and indispensable for living. Salaries, living expenses, taxes, savings and investments for the future ... There is also data that familiar but complicated and difficult "money" has become the "number one worry" for young Japanese people. What is "how to spend money" that makes you and others happy in the future? Hinatazaka46 participates in "Inevitable Research" for the first time! We will cut into the problems of modern money and report on the research results. And "that person" who knows all about money also appears!