[Light novel] Is it an engagement break? It doesn't matter (2 books in total)

the publisher:
Author: Miki Ito
Size: 128mm x 188mm
Number of books: 2
Language: Japanese
Category: Light novel
Latest release date: 2023-12-22

Synopsis:
Ceria suddenly was abandoned in the middle of a celebration sponsored by the Empire.
She actually participated in harsh subjugation every day to protect the frontier in contact with the demon forest as a beloved daughter of the Emperor and the most magical power of the Imperial Family.
Former fiancee, a cheating fiancée who should know the situation, looked down on his loved frontier as a rural area, and he couldn't stand it.
At that time, His Majesty the Emperor, who is the president of the celebration, appears ...!?