The Day She Took the Provincial Examination, I Walked into the Leadership

The girlfriend's first sword ashore was to kill her lover first. On the day he was broken up, the protagonist unexpectedly got an opportunity to be "helped by a noble person". From then on, he stepped into the county government compound and started a counterattack from a temporary worker to a leader's confidant, his ex-girlfriend returned, and he gamed the system to survive.