The head office of First Bank suddenly received a joint protest letter from 313 female members of a dating agency. They angrily pointed out that the bank had provided financing for a false dating agency.

Faced with such accusations, the bank took immediate action and dispatched the experienced Soma Ken (played by Takaya Kamikawa) and his subordinate Mai Hanasaki (played by Xing) to the suspected Aoyama branch to conduct an in-depth investigation.

The branch manager of the Aoyama branch is Arata (played by Motosuke Iida), who happened to be Soma's former section chief in the financing class.

Nitta is known in the industry for shirking responsibility and blaming faults on his subordinates.Soma knew this very well, because he had also been the unfortunate target of his “blaming”, taking the unnecessary blame for his mistakes.

For Soma, this investigation is not only an opportunity to uncover the truth, but also an opportunity to face the past and settle old scores.

With mixed emotions, he stepped into the door of Qingshan branch with Mai Hanasaki.What challenges and obstacles will the two of them face?How will Nitta deal with this sudden investigation?And what is the real situation of marriage clubs?All questions and suspense will be revealed one by one in this investigation.