I Can't Fall in Love With Paperman

When a BL comic artist transmigrated into the princess of Liao, she went right back to doing her old job... but then her main character came out of the book and told her to stop it with the gay stuff! Threatened with a sword at her neck, will she surrender or resist? What's worse, the plot seems like it's out of her control; who's the mysterious villain acting behind the scenes?

(Source: Bilibili, translated)