Who made me the Emperor's twin sister?!

Truck-sama strikes again! From a normal office lady to a twin sister of the future Emperor of the most renowned empire in the continent.

Reborn as Claudia de Alger Obelia, how will one survive after being reincarnated in a manhwa she loved as a character that wasn't supposed to exist?!
Though something seems to be wrong with the plot...

" As the Emperor of this Empire, I order you to never leave my side again. You have to always stay with me!" My twin who was supposed to be cold hearted ordered with a pout on his face!

"I lost you once, I'm not losing you again." Anastacius, the previous emperor as well as my older brother said with a devilish smirk.

"You have to take responsibility for making me feel this emotion and having me realize what it is" Lucas, the wizard of the tower, whispered while leaning closer to my ear!

'Though I don't have any knowledge of you in the Novel, it's pretty clear to me that I need you for my survival!' Athanasia, my dear niece, your thoughts are leaking out.

Just what is going on?!