Princess Pink, who lives in the kingdom of Greenwood, flees her country to avoid a political marriage with a prince from a neighboring kingdom and ends up in South Korea on Earth. There, she meets a young man named Bin—a photographer and the son of a chaebol—and begins living as his boarder. Originally a mature and beautiful princess, she suddenly transforms into a short, stocky girl upon arriving on Earth. Though she lives as Bin treats her like a little guest, she gradually develops feelings for him over time. However, she soon learns of the taboo that fairies and humans must never fall in love...