Seo jin is cold.You ended up as a transfered student at his school. You had no friends so you wanted to make friends to not be left alone.You became friends with jini and hana. They had boyfriend but you didn't have one so you pretended to have a boyfriend to be friends with them. Once you ran into seo jin you clicked pic of him. Next day you showed his pic to your friends but as a surprise he goes to your school. He found out you lied so now you have to obey him so he will not spill the truth.