An Extra Stole the Male Leads

After being reborn as Selonia Bessin, the protagonist of a romance fantasy novel, a girl finds herself on a demon-slaying quest alongside the three male leads of the story. They manage to vanquish the demon lord, but Selonia ends up losing consciousness for three months during their return journey. When she finally regains her senses, she learns that the trio has now developed feelings for Grace Benet, an unfamiliar extra. To make matters worse, the demon lord they had supposedly defeated has returned in a striking human guise! What could be the reason for his comeback, and who is this enigmatic Grace who is now the center of attention?