Hana is a brilliant student, beautiful and attractive innocent girl. She is very shy that she never dare to make friends at school, she just go to school to study and go straight back home after that. She never mind people or anything around her. She doesn't care, especially about guys. She has never been in love. 

Yesung is the main vocalist of the famous Super Junior, a boy band who's making every girl's knees week - almost. Being the main vocal, he has a big responsibility to be careful and always give his 100% in every performance. Every member has a duty to a fan service, to be every fan's fantasy boyfriend. Since, every one from the group wants to have fun some times, they will all go our secretly and have fun on their own like a normal person but they shouldn't get caught.