My Little Sister Stole My Fiancé: The Strongest Dragon Favors Me And Plans To Take Over The Kingdom?

Lady Eliana, from the distinguished Ducal House of Lumiere, has won the heart of Crown Prince Alvin after years of training to become the ideal bride for the sake of her family. Unfortunately, her quest is unexpectedly undermined by her younger sister Luna, who is also smitten with the prince and convinces their parents to arrange a switch. Eliana is devastated by this turn of events and decides to offer herself as the sacrificial "Dragon's Bride" in a desperate attempt to escape the disgrace she feels. However, instead of meeting her doom, she is rescued by the dragon Greed, who offers to marry her instead. Grateful to be spared from death and eager for a new beginning, she agrees. What kind of unusual adventures will the unconventional couple experience?