Ryuu Kishi-sama to Hajimeru Mofumofu Kotatsu no Sewagakari

In the Kingdom of Meltosia, a country where dragons and humans coexist, Fiona is travelling to the capital only to get caught up in a case involving the poaching of dragon eggs. She is rescued by the dragon knight Victor and during that time, she accidentally hatches one of the eggs...!?
A fantasy romance begins between a serious dragon knight and a gentle, tough girl, connected by a fluffy baby dragon!

https://www.cmoa.jp/title/292360/