I was Told to Relinquish My Fiance to My Little Sister, and the Greatest Dragon Took a Liking to Me and Unbelievably Took Over the Country

Synopsis

Just as all the honest hard work she’d put in from a young age was about to bear fruit, Eliana's engagement to the Crown Prince is broken off by none other than her spiteful younger sister. Heartbroken, she announces her candidacy to become the “Dragon’s Bride”, an honorable sacrifice, but after she throws herself to the boiling magma below, she awakes to find herself collapsed, covered in drool in the middle of a crater and... facing a legendary dragon who's actually willing to marry her?! A turbulent master and servant (?) relationship between “The Legendary Dragon” Greed, and “Super High Class Lady” Eliana, starts now! Source: MU