An Extra Stole the Male Leads

Reborn as Selonia Bessin, the heroine of a romance fantasy novel, a girl is thrust into a demon-slaying mission with the novel's three male leads. They successfully defeat the demon lord, but Selonia falls unconscious for three months on the journey back. Upon awakening, she discovers the trio is now enamored with Grace Benet, an unknown extra. Moreover, the supposedly defeated demon lord is back in hot human form! Why has he returned, and who is this mysterious Grace stealing the limelight? --- A woman who has lost her male leads to an extra who did not appear in the original story... That's me. Selonia fell into a coma on the way back from defeating the Demon King. After wandering through death for several months, she survived, but what? “I want you to break off the engagement. I want to hurry up to marry Grace.” “I want you to pretend my knight’s oath to you didn't happen.” “Give me back my heart. I’ll give it to Grace.” The fiancé who was the male lead, the paladin and the dragon who were the sub-male leads, and the fellows all turned away. These reckless bastards! There was a lot of cursing, but what can I do to stop it? I was trying to start a new life in a cool way. By the way… “Do you know me?” How is the dead demon king alive? “What, I don’t know…” “No, you know me. tell me Who am I?” To make matters worse, the Demon King, who has no memory, sticks to my side and does not leave. Inevitably, I tried my best to prevent the return of the Demon King. “How can I always hold your hand?” Why is it not enough to spit out vulgar words? “Are you going to kill all those who left you? Just speak.” He’s even going to kill the male leads for me!