Mai joins Tokyo Daiichi Bank's internal inspection department, where she reunites with a former colleague. They head out for their first assignment.

Letters of protest from women who paid large sums to a suspicious marriage agency financed by the Aoyama Branch prompt Mai and Soma to investigate.

A young, promising bank employee vanishes without explanation. As Mai and Soma look into the disappearance, the man's mother bursts into the bank.

A bored Mai jumps at the chance to visit the branch where she used to work, but a startling bank inspection gets underway just as she and Soma arrive.

After a story alleging sexual harassment from a branch manager appears in a weekly magazine, Mai and Soma are tasked with finding the accuser.

After a friend plays matchmaker and introduces Mai to a handsome restaurant owner, one of his employees approaches Mai with concerns about bribery.

An elderly friend sets Mai up with a charming banker. But Mai grows suspicious of his intentions toward her friend when his bank files for bankruptcy.

As the bank closes in on a long-awaited business opportunity with the powerful Itami Group, Mai clashes with the haughty son of the group’s chairman.

When crucial salary data for Itami Group employees abruptly disappears before payday, the bank assigns Mai and Soma to the investigation committee.