She was Nam Woohyun's secret younger step-sister , Nam Woohee. Nobody knows about it and she is not planning to tell anyone. She doesn't like attention . Until when the badass came to her and ask her to be his girlfriend . Of course , the she that does not like attention refused . However , that badass Lee Sungjong is persistent to Make her his girl. Then he stumbles across her secret and she has no choice to be his unless he tells the whole school her secret  . However , when she finds out that

We were in love.... or so I thought . We had been happy together , with me forgetting the fact that he was a player , of course , being in love. I was the longest girl he has been with...... Of course, until I saw him cheating on me. He had seen me , and told me that...... everything he said .... was a lie. But I had wholeheartedly loved him. I really regret loving him.... But can I forgive him when he asks for forgiveness ? Or will I still hate and not trust him ?