The heroine entered the palace and married the emperor because the hero had exiled the second boy. Although she became a concubine, the heroine was not in her heart and missed the second boy all the time. However, the hero was the emperor and often used his status to make the heroine do some actions on some important occasions for the second hero to see. Deliberately irritating the second male protagonist and making him give up his feelings for the female protagonist.
The heroine was reluctant, but there was nothing she could do.
The female protagonist wants to find evidence that the male protagonist framed the second male lead.
The heroine knows that it is impossible to be with the second hero. So I followed the male protagonist's request without emotion.
The male protagonist confessed and told the female protagonist that he was not the one who framed the male protagonist, and the two opened up their hearts together.
Finally the misunderstanding was solved and the two were together.