A 28-year-old Peony heroine who works in foreign trade time travels to an 18-year-old high school girl. In another world, she begins to think about how to use her strengths to live a more exciting life.
In this world, there are no foreign trade orders and no day-to-day work, but it is not easy to study every day, and you have to think of ways to deal with an old female class teacher every day.
The math teacher is like a best friend, having an affair with the top student in the class, but then he meets another romantic partner during self-study the next night.