It Was Just a Contractual Marriage

I, the last princess, will use you to survive! As the last remaining member of the imperial family, Elise must do whatever she can to survive and someday reclaim her empire, even if that means marrying the archduke of an enemy nation and promising to bear his child! As a dragonborn, he needs an heir, and it's not as though he loves her... right?

(Source: Manta)

Note: Includes one extra chapter.