Black Dragon's Apprentice Bride

Once every few hundred years, Ryu marries and marries his blood. This is a story of such a dragon and a person. Money is more important than sex appeal! Aisha works hard to pay off her parents' debt. When I worked hard today, suddenly I was suddenly fallen in love with a handsome boy like a prince ☆

And I was told that "I am a bride of Dragon God from today"!?

source: https://www.mangaupdates.com/series/fugce2h/kurotatsu-sama-no-minarai-hanayome