What Should I Do If My Fiancée Monitors Me at the Border?

Ed, who had just passed the exam as a registered civil engineer, was reborn as the eldest son of a border viscount. He thought he would enjoy the carefree life of a decadent aristocratic master in this life under the protection of his powerful father. Unexpectedly, his arrogant father died suddenly and left a foreign debt of 800 gold coins. Ed had no choice but to stand in front of the stage. His fiancée wants to control him, his neighbors want to annex him, and monsters want to ravage him... He could only... Write letters to his fiancée complaining about his poverty, dig holes and traps for his neighbors, and build fortifications for monsters. "Aren't you talking about a running rat with a poor territory? How do I think you live a comfortable life?" A few years later, his fiancée Vera asked. "I don't know, I'm just a dust collector." Ed said.