Harashima Hiromi (Maki Yoko) had worked at the headquarters of Yotsuba Bank since she joined the metropolitan bank straight out of college. However, she has a very strong sense of justice and caused an incident three years ago. This resulted in her secondment to an affiliate company. This time, Hiromi is selected to head the Corporate Sales Division at the Taito branch as part of Yotsuba Bank’s project on women who excel, and ordered to turn around the struggling bank branch. As a bank employee who puts customers first, she works on reorganising the bank branch with bold ideas and energy.