The bodies of the top idol and school bullying have been switched?! Hong Joo-ah, an outcast in the school who is bullied every day at school. The top idol loved by the whole nation, Ko Yo-yeon. Joo-a envy the life of an idol receiving love, and Yo-han envy the life of an ordinary and free person. One day, while longing for each other's lives, their bodies are reversed!? Spectacle body change romance, sasaengdol!