Isao Kurokawa, a salaryman who wore himself down working for a black company, awakens from death to find himself reincarnated as Prince Bratt, the villainous prince from a video game he was obsessed with in his past life. Bratt is known across the kingdom as the "Black Pig Prince" for his arrogant personality, cruelty, and overweight appearance. His future is already written: he will succumb to darkness and be killed in a tragic death ending.

Refusing to accept this fate, Bratt uses his complete knowledge of the game's events to change his destiny. He dedicates himself to a strict regimen of sword training, dieting, and monster extermination. Though he begins these efforts purely as a survival strategy, the physical and moral changes do not go unnoticed. As he grows stronger and sheds his former gluttonous image, the people around him begin to see him in a new light, and his unexpected transformation earns him their respect.

The story follows Bratt as he navigates the game's original plot while trying to avoid the triggers that would lead to his downfall. His journey takes him from a reviled figure to a capable prince, using his past life's memories as a guide to outmaneuver the scenarios designed to destroy him. Publication for the manga began in December 2022, and its run concluded after a total of thirteen chapters collected across two volumes.