MTL - Endless Fall - Chapter 1 Be more considerate of me, okay?

Urano, a bookworm who had finally found a job as a librarian at a university, was sadly killed shortly after graduating from college. She was reborn as the daughter of a soldier in a world where the literacy rate is low and books were scarce. No matter how much she wanted to read, there were no books around. What is a bookworm to do without any books? Make them, of course. Her goal is to become a librarian! So that she may once again live surrounded by books, she must start by making them herself.

I possessed a minor character who marries the prince. I’m not thrilled about it. The prince is a scumbag who flirts with the heroine despite being engaged and eventually gets defeated by the original male lead. In the epilogue, all he does is apologize to his fiancée and marry her, with barely a line to his name. Well, his personality is twisted, but at least he’s handsome. And since he’s the third prince, he doesn’t have to shoulder the burden of ruling the kingdom. That’s decent husband material, I suppose. Go ahead, make a fool of yourself. You’re going to marry me anyway. I’ll just sit back and enjoy watching your embarrassing history unfold. “Doris Redfield. Don’t expect me to ask you to dance at this ball. Maybe not at the next one either. Or the one after that.” “Yes, Your Highness. As you wish.” “Even though we’re engaged… wait, what?” “It’s just a joke proposal our parents once tossed around, isn’t it? You don’t need to take it seriously, Your Highness. I’m really fine with it.” “…Is that so? Yes, that’s… fine, right?” Why are you panicking, prince? You started spouting nonsense first. Where’s your conscience? But then, this guy really has the audacity to ask something outrageous. “…Do you, perhaps, have another man?” The guy who flirted with the original heroine is saying this now? Calm down. He’ll regret this later. All I need to do is remain a devoted fiancée until then. “What are you talking about? A woman like me… plain, not beautiful, with a gloomy personality, what man would even—” “What? Who dared to say that about you?” …You did, in the original story. This guy is acting weird. But he’s not the only problem. “My dear little sister Doris, that dress you’re wearing today is dreadful. No wonder there are rumors His Highness has abandoned you.” “Well, it can’t be helped. His Highness is too good for me anyway.” “…Hold on. Too good? Who said that? Wait, were you really dumped?” The original villainess, who also happens to be my older sister, Natalie, is suddenly interested in my love life. Why are all the original tr*shy characters growling at each other over me now?!

Five years ago, she left behind an egg and said, “This is the son I bore for you. When he comes of age, that will be the time of my return.” He thought she was joking, but months later, the son hatched out of the egg, looking like a normal baby but with two shiny, adorably cute little dragon horns on his head. However, she remained far away with no signs of returning.Later, she disappeared for five years, and he went mad for five years, until Little Dragon brought home a woman, and he instantly came to his senses... But Little Dragon said, “Daddy, even though you don't have a wife, you're about to get a daughter-in-law soon. She saved me, and I want to dedicate myself to her in return!”From then on, the father and son found themselves in an open and covert struggle for her affection.“Your Excellency, Miss Si's medical skills have amazed the entire globe, and all the bigshots are busting their heads to court her. Your heroic rescuing act is of no use...”Mo Yinhe suddenly collapsed to the ground, coughing violently, “Quick, go call her to save me!”“Your Excellency, the seven arch-rivals whom you beat until their livers exploded are all Miss Si's biological brothers. They want to take Miss Si back to inherit the throne...”Mo Yinhe immediately announced his abdication, pulling his son to roam the streets: “Sonny, from now on, Dad can only follow you to seek refuge with your wife-to-be.”Little Dragon shook the shiny, adorably cute little dragon horns on his head, “Daddy, I've already arranged a retirement home for you, guaranteed to secure your peaceful old age~”

[The Demon King is Dead], a story in which the Demon King got immediately killed in the Prologue. I became the ‘Demon Prince’ of said novel.

…Help me.