If you're looking for manga similar to My Little Sister Stole My Fiance: The Strongest Dragon Favors Me And Plans To Take Over The Kingdom? (Light Novel), you might like these titles.
On her sixteenth birthday, Viscountess Mille-Feuille Forêt Noire, a member of a long-lived race called dragonkin, remembers her previous life as the murdered fiancée of Dragon Duke Vacherin. She immediately vows never to get involved with him again and aspires to live a peaceful life by hiding what she knows, but after a twist of fate or two...she soon winds up the Dragon Duke’s personal attendant! Past intrigue now begins to yield problems in the present. Who killed Mille-Feuille in her last life? How can she improve the lives of fellow dragonkin women? Is she in love with the Dragon Duke, or are her feelings just lingering attachment from their old romance? And how will this all affect her new relationship with her former fiancé? History may or may not repeat itself in this romantic fantasy!
“At last, I've found you, my Bondmate.” As Flowerfolk, I never dreamed of having a fairy tale romance, but I also didn't expect to be dumped three days after being confessed to by a dragon knight! Spurned and angry, I decided to devote my life to my work as the human princess's hairstylist, only to find out that the princess was going off to dragon country to marry the Dragonkin prince and taking me with her. Now I have to serve in the same castle as that jerk who dumped me! The princess can have the fairy tale ending, I'm done with romance.
Flora, the daughter of the western frontiers Margrave, came back from the battlefield to find out that her fiance wishes to annul their engagement. It didn't really matter for her, but what did that foolish prince meant by "a worthless nobody of the Margraves family from the edge of civilization"? And while there are signs of a conspiracy in court, even worse news about the invasion of demons arrives from the territory. The advance of the saint, who is loved by the legendary dragon and the Mofumov spirits, has finally begun!
From the weakest summoner to the world’s greatest dragon knight. The adventurer Jay was mocked by those around him as the “Lizard Summoner.” Although he was a professional summoner, the only summon beast he could call forth was a small lizard, which led him to be despised. As a result, Jay couldn’t form a party with anyone and continued his adventure alone, cherishing his little lizard, Kyuk. But one day, suddenly Kyuk grew into a huge and magnificent dragon – Bahamut! Seizing this opportunity, Jay began working as a carrier. Before long, rumors of the “Carrier Dragon Knight” spread throughout the royal capital, and everyone started to rely on him. From the mocked F-rank summoner to the world’s greatest dragon knight.