Who would have thought? Lee Ji Eun, a young girl from Seoul was accepted to work as a staff member at BIGHIT Entertainment's agency. One of the largest agencies in South Korea, and even the world. Even more surprising is that Lee Ji Eun unexpectedly reunited with her first love, Park Ji Min. Jimin is a member of the popular boy band BTS. However, on her first day of work, Lee Ji Eun had been confronted by a very arrogant, rich beautiful girl named Kim Ae Ri, who turned out to like Jimin very much. As time went by, Min Yoongi, one of the BTS members, also expressed his love for Ji Eun! And Sejin, BTS managers, strangely even desperately protected Lee Ji Eun and treated her more than a staff member! What secret is Sejin hiding? And who will Ji Eun choose from the love triangle between herself, Jimin and Yoongi?