Park Hyung Suk, a perennial target of bullies due to his short, overweight, and unattractive appearance, decides to flee his tormentor by enrolling in the renowned Jae Won High School. However, just before his transfer, a miraculous transformation occurs: he wakes up in a new, perfect body, leaving his former self behind. Now toggling between his original and ideal bodies, Hyung Suk embarks on a journey to adapt to his enviable new identity at J High while unraveling the enigma behind his extraordinary second form.