Isn't She Lovely? (On hold)

Hyejin was Bobby's childhood friend even though she's younger than him and turned out to be like a little sister that he never had. They grew up together for years, he was like a sibling she never had since she was the only child in family. They both really like to spend time together, because of the same background story they had and also similar dreams that they hold on to.
It was really a great time for both of them until Bobby chose to return to their native land to pursue his long-life dream. Few years later, Hyejin attempted to pursue her dreams too and at some point they managed to meet again in a totally different situation than back at America.

Will anything change between them?