※Published by Futabasha M Novels f, and serialized as a comic in Comic B'reeze

Sara, who serves the princess of the Kingdom of Sareille, is commanded by the king to impersonate her mistress and enter into a political marriage with the prince of a rival nation.

Believing it was all for the princess she was indebted to, she soon discovers the princess has stolen her lover, who now even insults Sara, calling her "unlovable."

However, Sara, betrayed by those she trusted, did not fall into the depths of despair.

"…I will! I will absolutely, absolutely find happiness in Ferrier!"

Goodbye, my once revered princess.

Goodbye, my beloved lover.

I, Sara, as Princess Elmire, will find happiness with the Prince of the neighboring kingdom (a recluse, a misanthrope, who always wears a mask)!

※Main story complete. "The Princess Consort's Smile: Extra Story" can be found in the series list.