They Framed Her. He Crowned Her.

A dragon princess is falsely blamed for a plague by the two people who should have stood beside her: her fiancé and her maid. Rescued by a man hiding his true identity, she gains a chance to challenge their lies. Her protector is the primordial Dragon Emperor, and their growing bond gives her a future far beyond the disgrace her enemies planned. As she pursues revenge, the woman they tried to condemn rises toward a new love and a crown of her own.