This drama is adapted from the novel of the same name. It tells the story of the protagonist Hanasaki Mai who was suddenly transferred from the window of a large bank to the temporary store class of the headquarters. Then she smoothly, refreshingly and beautifully solved the incidents and scandals that occurred in the branches she visited. It describes her attitude of never turning a blind eye to improper behavior and standing up for the disadvantaged. After the first two seasons of the TV series were broadcast, a new novel of the same name was published. The new story involves a large merger of banks and introduces a new villain. The new TV series will interpret this brand new story with a brand new cast.