The Extras Were Bigger Than I Thought

Ye-eun, an ordinary Korean college student, accidentally becomes possessed by the body of Adeline von Lopitz, the villain of the novel “The Observation Diary of the Crown Prince,” which has been out of series for several weeks.
Having read Adeline’s end in the novel, she goes to meet Sub Nam-joo to change her future, but on the same day, she runs into Alex Manningham, an unlikable extra who has been brought in to eliminate Sub-Nam-joo.

“Good night, miss. No, I should call her Princess Lopitz.”

Is the man in front of you that Alex Manningham?
Captain Manningham was dazzlingly beautiful. It’s even better than the male protagonists I saw in the illustrations in the novel.

As her perception of her abilities and appearance gradually changes, Adeline asks for her help in saving the empress, who is about to be assassinated.
However, he doesn’t trust Adeline and doesn’t lend her a helping hand.

Will Adeline be able to convince this man to avoid the villain’s fate?