The main character, Marina, is a somewhat insensitive scientist who writes webnovels on the side. she develops a visual reality and enters her novel but soon realizes she cant get out. she gets taken as a slave but then dresses as a boy, burns the slave building down with the documents, kidnaps and imprisons the main character of the story, and threatens her way into the position of castle mechanic. she then starts producing a bunch of modern science and impresses everyone. its a bit like dr. stone.
Marina isnt taken by the belief that the story must play out like it does in the novel and thinks of all the charcters as her "babies" as she did literally create them. she's no pushover and is actually really funny.