It all started when Cha Yena attended a university festival and a boy group, BTS, performed. She was mesmerized on  visuals and especially their moves. After that day, she became their fan and tried to attend the group's fanmeeting, but the problem is she can't go in there. Her parents are part of the royal family in South Korea and her action can affect her family.

She thought that the first time she saw them will be the last, but her second meeting will change her life completely.