Krystal has just returned to South Korea after living in the States for 8 years. Krystal experiences how being overlooked, rejected, being a shadow, and having a first love feels while at her new school. But how can this be? She is rich, pretty, skinny, and popular with the boys at school. She learns this with her friends and that one appealing boy.

Kai is one of the most popular boys at school. All the girls want him and all all the boys want to be him. So, how can his life be bad at all? The answer is: those two appealing girls.