Muscle Joseon

Choi Young-jik was the ultimate fitness enthusiast—a food and nutrition major with a first-class certification as a daily sports instructor and fifteen years of experience as a seasoned trainer. However, his life takes an unimaginable turn when he suddenly wakes up in the Joseon era, trapped in the frail body of Prince Soo-yang, the second son of King Sejong the Great. Overnight, his hard-earned muscles vanish, leaving him shocked and disoriented. Yet, his dismay quickly shifts to overwhelming excitement upon realizing that his new father is none other than the legendary King Sejong. Whether this bizarre situation is a dream or reality, Young-jik is thrilled at the prospect of meeting such a magnificent historical figure. That excitement evaporates the moment he actually sees the king. Instead of a majestic ruler, a severely obese man sits before him, visibly struggling just to breathe and showing clear signs of diabetes. To make matters worse, Young-jik soon discovers that the government officials surrounding the court are equally plagued by chronic illnesses and weak physiques. Faced with a kingdom suffering from widespread poor health, the proud veteran trainer feels a familiar fire ignite within him. Armed with his extensive modern knowledge of exercise and nutrition, Choi Young-jik resolves to spark a nationwide fitness revolution in Joseon.