@A_12 of course 😊
Spoiler!
Sid and Lulu won the contest and they also revealed the empress' scheme to make her son the winner by cheating. Sid saved Lulu from being trapped in the demon world. During a fight with a minor villain, Lulu got transported into the demon world, and only Sid succeeded on following her there, but due to the power of the villain, one should remain trapped there. Sid sacrificed himself, and stayed in the demon world to save Lulu.
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