Seiryaku Yori Ai wo Eranda Kekkon: Koukai wa Juunengo ni Yatte Kita

Crown Prince Maximilian breaks off his engagement to Sarah, a marquis’s daughter praised as a perfect lady, and instead marries Sally, a free-spirited baron’s daughter.
Having chosen “true love” over a political marriage, he believes that the power of love will bring him a happy future.
However, once Sally becomes crown princess, she shows none of the education, grace, or refinement expected of her position, causing one problem after another.
As a result, the crown prince and princess gradually become the object of cold stares and criticism from those around them. Meanwhile, Sarah quickly marries an influential duke. As a duchess, she supports her husband and shines more brightly than ever.
People begin to say that Sarah, not the crown princess, is the one who truly looks like royalty.
And so begins a shocking tale of downfall, sparked by a broken engagement!