The Cannon Fodder Female Partner's Daily Routine of Hugging Her Thighs

As the only female of the Alfalfa clan, Yun Jin was very tired. Not only do you have to deal with the old man's romance novels, but you also have to abide by a promise made hundreds of years ago. As a result, he was accidentally tricked by the old man, accidentally got married, and all his life-long problems were solved. This person is a crippled king. Why does he stand up suddenly and always moves his hands and feet? What about the promised heroine being selfless and sacrificing herself for others?