해서는 안 될 사이

In Their Forbidden Love, Do-gyeom visits Chae-sun after hearing about her outstanding grades, despite always being focused on becoming the youngest department head. As the two grow unexpectedly close, Chae-sun becomes unsure of her feelings and begins to pull away, leaving Do-gyeom hurt and searching for the reason behind her sudden distance. (Source: Lezhin, translated)