You spend the first episode watching a kid get destroyed for how he looks, then suddenly he's beautiful and nobody recognizes him. The show doesn't let that switch feel like a fantasy escape. It uses it to show you exactly how the world changes the moment appearance does, and how that hollows you out from the inside. The animation and character writing back this up hard enough that the absurdity becomes devastating instead of silly.

Park Hyung Suk is a chubby, insecure high school student who is bullied, mocked and beaten so often that he wishes he could simply vanish. When he changes schools hoping for a fresh start, he wakes up in a tall, handsome and surprisingly athletic body. He soon learns he now has two bodies that look nothing alike: whenever one falls asleep, he wakes up in the other. Thrilled by his luck, he walks into his new school as the good-looking one. Popularity brings its own problems, though. Some girls care only about his looks, and jealous delinquents keep starting fights. Keeping both lives going proves to be a constant struggle. The series mixes action, comedy, drama and a supernatural twist in a world that rewards appearance.