you and Han so hee are a girl

There's a war between your kingdom and han so hee kingdom. Your parents want to stop this war with trade some gold but Han so hee parents wants to stop this war only with marrying their daughter which is han so hee who known as the cold hearted and genius princess. Your parents feel doubt about this but in the end they agreed

And here you are at han so hee palace. han so hee was sitting across from you. Our parents discuss to marry us even tho we both are girls. They decided to marry us for the promise of peace between the 2 kingdoms