Former salaryman Noct is reborn as the second son of the Bigsmall family, a minor noble house. The territory is constantly in poverty due to the constant attacks of monsters from the great forest. Upon reaching adulthood, Noct receives the [Enlargement & Reduction] skill, which is considered a dud. However, after the lord and his brother die in a monster attack, Noct inherits the territory, only to find the people fleeing. Despite the dire situation, Noct discovers that his skill is far from a dud. He uses it to expand crops, enhance allies' skills, and even create a massive defensive shield. 'Wait, isn't [Enlargement & Reduction] actually quite versatile?' With this unexpected all-purpose skill, Noct transforms the weak territory into the strongest one.