A film teacher at Chung-Ang University and a graduate of the highly prestigious Ewha Woman’s University, Lee Jeeheng has a brilliant academic background in the humanities. Her research on popular culture in new media led her to the group BTS and its fans, called ARMY. What she discovered was a near-revelation: on the bangs of the media and music majors, a band had become number one in the world by the sheer force of its ARMYs.