Ore, Akuyaku Kishi Danchou ni Tensei Suru.

Justin is the formidable and merciless commander of the Knights, an arrogant figure whose very presence commands terror from everyone around him. However, this intimidating facade conceals an entirely different past. Before waking up trapped inside the perilous world of a light novel, he was an ordinary college student in the real world, dedicating himself tirelessly to the care of his seven younger brothers. Now forced to navigate this harsh fictional reality in the body of a notorious antagonist, Justin faces a daunting predicament. Burdened by the reputation and actions of his villainous counterpart, he realizes that continuing down this wicked path leads directly to inevitable ruin. To survive his grim fate, he must actively rewrite his storyline and alter the destiny awaiting him.