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