The Final Campaign

I was born into the world of a novel, but I only know the protagonist’s name and nothing about the main plot. Isn’t the sect’s senior sister supposed to be the protagonist’s love interest? Why does she keep staring at me? Why are things from my world appearing here? Why do they call modern slang ancient language? What do they mean, I’m a demon from beyond the realms? What do they mean, hunt down and kill the demon? What on earth is going on….