An unconventional human resources consultant exposes the dark layers of corporate malfeasance that lurk beneath the surface at Kyoa Fire Insurance. No evil can escape this beautiful but ruthless heroine, Mako Tsubaki.
Mako is in charge of training new employees at an insurance company. On the first day, she makes the new employees write a letter of resignation, and also declares that the 50 new employees will be narrowed down to 10, and begins to give them hard tasks.
Mako tells Hiroshi to look for restructuring targets in the claims department. There he meets Minoshima, a hard-working employee who is stuck carrying the load for an indecisive boss and an incompetent coworker.
Hiroshi is ordered by Mako to go to the general affairs department next for his training. This time, instead of choosing a candidate for restructuring, he is asked to fall in love with a woman chosen by Mako.
Hiroshi is sent to the PR department where Yuika, a pregnant woman, is to be interviewed for a TV show about the company's childcare support system. However, other female employees are upset about the increased workload they now have due to Yuika's situation.
Hiroshi's next training is in a department where the company's elite work. An employee collapses from exhaustion, leading to speculation that this department may have a secret room where they work after pretending to have left the company at the end of the work day.