Park Hyung Suk, a high school student, endures daily violence, humiliation, and name-calling. The bullies shamelessly exploit his chubby and insecure persona, reducing him to a mere punching bag and plaything. He yearns for the day when he could vanish from this constant torment. His wish is granted when he enrolls in a new school, hoping for a fresh start. A miracle occurs when he wakes up in a brand new, tall, athletic, and handsome body. From that moment on, he possesses two distinct bodies that alternate whenever one falls asleep. Hyung Suk finally tastes victory, entering his new school as an attractive and physically strong young man. Unfortunately, acclaim brings its fair share of struggles. Girls solely praise him for his looks, while resentful bullies pick unwarranted fights. He now finds himself unable to elude trouble. Juggling the responsibilities of two different lives, Hyung Suk confronts ceaseless obstacles in both of them.