@Tobias Rietveld Bro, that big plot has a number of small arcs.
Spoiler!
Bellesac, Clerivan, Tia revealing her identity, Empress and Astana’s ending and not to forget Emperor's ending, Perez becoming Crown Prince, Tia taking over the cleanup of Angenas.
So that's why I said a lot of arcs because it will atleast need 30 to 40 chapters to complete this whole season since we are at Chapter 218 of the novel and the main story ends at 256 😑
I like to post spoilers for the stories I find interesting because I don't have much time to read novel due to busy schedule
you will find me in most romantic historical manhwa comment sections 
you will find me in most romantic historical manhwa comment sections