you finally moved back to Korea after a few years living in the States. there was someone that didn't like you, which is han yujin. he used to be top 1 at that school, but since you moved here, his place dropped to top 2.

he keeps making your life miserable at school. one day, his necklace was missing and he saw you wear the same necklace as him.

"hey, you stole my necklace ! give it back to me !" he accused you, not knowing that you are his childhood friends .. or lover.