Karappo Seijo toshite Suterareta Hazu ga, Totsugisaki no Koutei Heika ni Dekiai sareteimasu

Tiana, who was mistreated as an incompetent saint in her homeland, was married off to the cursed empire. On her way there, however, her former life as a great saint is awakened, and Tiana, who has returned to her victorious nature, vows to repay Sylvia as soon as she regains her power. Meanwhile, in a neighboring country, her husband, the emperor with a brilliant brow, is Felix, her protégé from a previous life!

"This is a contractual marriage until the country stabilizes."

Felix has made up his mind that this is a contractual marriage until the country is stabilized, but he gradually begins to dote on Tiana...

(Source: Kadokawa, translated)