How is 'The Red Badge of Courage' a realistic novel?

It is said that the true meaning of a mage is to fully understand the truth of the world. A mage named Saleen Metatrin goes on many missions as a normal mage to try and change his fate. This in turn led to many problems and adventures. 

Sheila is an average girl who likes to play video games and watch animes in her free time. If there’s anything that stood out from her, that would be her beautiful appearance. Due to spending too much time playing video games till late at night, she would usually forget to do her homework which she would, later on, asked her best friend, Ria, for help. A total average gamer-otaku girl. Like any other day, Sheila was walking her way to school when suddenly the phone in her pocket vibrates. She pulled it out of her pocket to check with the expectation of seeing a new message, but the result was something that would change her entire life completely upside down. Leveling System, it was a mysterious app which suddenly appeared inside her phone. By using it, she could level up like the character in the game and become stronger. But what would an average girl do by becoming stronger? Not expecting to fight anything absurd in her daily life, Sheila slowly adapts to her new life of leveling up inside an instant dungeon. But out of nowhere, A goblin appeared in front of her somewhere in the alleyways. Where did it come from? Not knowing anything, Sheila ended up killing it. That night, She woke up to a nightmare where the world turned chaotic as monsters run rampage everywhere, it was a world where a weak human life was nothing but garbage, a world where strong prey the weak. She believes it was a premonition of what her future would be if she does nothing. Will she stand up and take responsibly to fight for others? Or would she be selfish and only fight for her loved ones? The fate of the entire world is on her hand. Her decision will decide the outcome of everything. *** Important note: English is not my first language, so do expect to see a grammatic error and if you're such a kind and big heart person and would willing to help, feel free do so as I appreciated any sort of support. I'm also a new author who only wrote the story because purely for my own pleasure. Be warn though as the story progress and development is very slow. I started writing this story out of spit of not having anything interesting to read, do expect some cliche since this author likes it. *** [UPDATED!]The characters design followed by tiny bits information(Be warn as it would be a spoiler to the new readers!): http://imgur.com/gallery/twsIaJe If you like the story, please give some power stone, any will be appreciated! Credit to the artist, I just simply edit to fit the book cover; https://picrew.me/image_maker/234517 *** Discord: https://discord.gg/2JMqZ3e Support me: Send me a cup of coffee: Ko-fi/minxmean Patreon: patreon.com/NEETGuy

I clarify that this is written in English with the translator, because I wrote the original story in Spanish. If it has more errors than I already had, I apologize, I do it at the request of some readers, I hope you enjoy it. ------- After dying and getting the opportunity to reincarnate in the world of Harry Potter with some abilities, our protagonist is reborn as Ron's twin brother, being the most discordant Weasley within his entire family. With his particular way of being, he will live in this strange world Warning: Harem, incest, +18 I only own the characters I have created, all others belong to their respective owners. This is my first Fan-fic, I'm sorry if it's not a masterpiece and has several mistakes. ------ Warning: The MC's personality changed drastically from one moment to another due to some reasons, so at one point you're going to see him go from one extreme to another in personality. It doesn't make much sense, but at first I did this to try things without knowing if it would have a future, and only after a while did it take shape.

[ Discord: name : Merciless Clan lien: https://discord.com/invite/2m7XzWyEDQ] In this unique twist on the typical hero-villain dynamic, our protagonist, the villain, finds himself compelled to save humanity from powerful races threatening its existence. Meanwhile, the hero is preoccupied with gathering a harem. The story unfolds as the villain must not only confront external threats but also challenge so-called heroes, proving his perspective and ultimately taking on their responsibilities to ensure humanity's survival. As alliances shift and moral complexities emerge, the narrative explores the unexpected journey of redemption and sacrifice.

In his previous life, Marc was a thrill-seeker. He’s done tons of dangerous stunts like diving 214 meters in a single breath in Greece, Swimming the piranha-infested Amazon River, Free-climbing the Burj Khalifa, and much much more. Despite doing all those crazy things, Marc died a pathetic death. He meets God and gets a new chance at life with the Nikyu Nikyu no Mi (Paw-Paw Fruit) power converted to magic in Fairy Tail. Follow Marc as he begins a new life of thrill-seeking in Fairy Tail. *** The cover's not mine, so if the owner has a problem, I will immediately take it down...

A man had given his all to walk on the treacherous martial way. He was once great, however, just like everything else in the world, he had reached the end of the rope and disappeared without being able to reach further on the the path. However, fate has something else in store for him. Suddenly waking up in the mysterious and grand tower, all of his fiber being will tested. Will he survive in this dangerous and unforgiving place with many ancient monsters reigning on the top? Will he manage to survive and find the next path of the martial way and fulfill his ambition? Only time will tell.