AMerci

Tanya Edom's position as the Crown Princess is revoked by her fiance, Crown Prince Malek, and she is replaced by his lover, Lady Celeste. 
Tanya was head over heels in love with the Prince and wanted to become an Empress worthy of him more than anything. She did everything she could to impress him but her efforts failed to draw his attention in the end

Devasted, Tanya doesn't know what to do, all her life she'd been working toward becoming the future Empress of the Empire, and now her dream had been taken away. 
However, after overhearing palace servants gossiping about her demotion, she realizes that her obsession with the prince and being Empress are dreams she should put to rest and try to do something else with her life.

Doing so leads her to get warped up in a conspiracy concerning the crown. She ends up helping the Imperial Army solve a mystery concerning mysterious letters being sent across the empire.

Rejected Crown Princess To Imperial Cryptographer

"Your Highness, that's not how we write," her lady-in-waiting corrected her letter writing. This was like the thousandth time she had been corrected. Cleste sighed in frustration as she crossed out her mistake and tried to correct herself.

She was currently having her writing class, before that they had had etiquette classes. She had also had to be corrected multiple times.

Celeste had been learning this for a while now repeating things she had previously learned before but she still couldn't understand how to do it. Celeste felt so overwhelmed and agitated by it all.

Not to mention how her lady-in-waiting reacted to her errors. She made it obvious she was comparing her to Tanya.

That day after a hard day of lessons she went to Maleks room to spend time with him. Once she reached his room and saw his face she knew something was wrong.

Visiting their parents grave