You had an accident and transferred your soul into the body of the Baron's daughter "in the 19 centuries" who is known to be stupid and useless. You are betrothed to a duke who is known to be cold and never cares about anyone, when you visit the residence of Duke Xavier you see how magnificent the building is.

As you face the duke, you feel tingling all over your body from the tension

"oh so you're that stupid daughter"