RYUU HEIKA NO OKISAKI WA OKOTOWARI SHITAI!: RYUU HEIKA WA 10-BANME NO SOBAHI WO DEKIAI-CHUU

Iris, the head of the Regrett family, is on the verge of ruin. Se planned to fire all his servants, give up her title and territory, and become a commoner. However, her former butler, concerned about her, brings up a marriage proposal to become the 10th concubine of King Hybern, also known as "His Dragon Majesty"! I had planned to grow herbs in the herb garden and live a carefree life with my little dragon, so there's no way I could become a queen!!! A love comedy about the negotiations between a poor young lady and her doting emperor. (Source: Takeshobo, translated) — Description from AniList community (anilist.co).