When she got married, her younger brother carried her on his back to the palanquin even though he was shorter than her. It's a very touching moment. Also, in the end of the story when he came back to his study, he found her letter which basically said she would always be there for him.... TT_TT
After the power struggle in the palace ended and her brother became the Emperor, she left, searching for a way to undo a curse with the male lead. Here the story turns into more about magic, spells, reincarnation.