Fics like Bloodlines

Princess Lucy, raised to follow royal protocol with expectations already laid out for her, changes her mind about all of it when her father introduces her to his friend and lord's son on one eventful night, whose magic just happened to be descended from an extinct race of dragons. Unbeknownst to either of them, they, along with several others, become the victims of a plot to sow paranoia and corruption within the kingdom. As Natsu later fights to free Lucy from captivity and her upcoming wedding, even facing off against the fearsome Scarlet Knight to do so, he later comes to learn that Lucy was never the real target of her would-be husband and future king at all.

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