Shout-Out: Only Love is Deathless by Sita Bethel

Sreka’s younger brother, Dobrina, is in love. The only problem is that the law forbids him from courting until Sreka is married. Sreka hires the local adventurer, Košmar, to marry him so Dobrina can wed his love.

Even if he has to sleep on the couch, instead of with the crown prince on their farce wedding bed, Košmar will get to live like a king for a year. And once Dobrina is married, Sreka will quietly divorce him and send him on his way with gold for his services.

Nothing says destined romance like a battle with a dragon, so Sreka and Košmar stage their first public encounter to fool the royal court. However, as fate would have it, the dragon that was supposed to be as fake as their love is real.