Lost in love

Eun-Yeong and Kim Namjoon grew up together due to their mothers' closeness. In their teenage years, they realized that they experienced love for each other and decided to become boyfriend and girlfriend. But everything changed when Namjoon was chosen by a record label to be a member of a band that quickly gained fame, so due to constant touring and other commitments, they could not see each other. In addition, thanks to misunderstandings created by third parties and bad decisions, they cause the breakup of these young lovers. However, after a while Eun-Yeong manages to enter the same industry to fight for her love, but not as a singer, but as an employee of Bts' team, although Eun-Yeong would not be at the same level as Namjoon, for her it was enough that her first job was close to him.

But that joy changes when working with him she notices that the boy who always protected her no longer existed (or so it seemed), because instead of protecting her he bothered her, he was like the other side of the coin, a side she did not know, the sweet, loving boy who protected and supported her was no longer there, now there was only a boy who liked to have fun, make fun of her and treat her badly.

Why did Namjoon change so much? What will become of Eun-Yeong when she meets the new Namjoon, will she give up her first and only love, will she fight to return to the Namjoon she fell in love with, will the promise of love they made to each other when they were dating still hold true?