You Are the Only Love in My Life

I traveled through time and enjoyed the pampering of my parents and the pampering of my brother. I was really satisfied. But why do you have to let me go through so much? "I am willing to give up everything, as long as you promise me to be my wife." "Then who is that woman?!" "It has nothing to do with me. The only one I care about is you, the only one in my heart, and the only one who is my wife!" Besides, is my brother really related to me by blood? But why does the second prince, who rides on a tall horse and is admired by thousands of people, look so similar to the second brother who has been missing for a long time?