Monkey D. Luffy has been sent to the past by an unknown enemy, being send after receiving the strawhat from Akagami Shanks to full fill his promise to become a great pirate and one day return it to him, with all his knowledge and powers he has to once again go through his life adventure with the strawhat pirates p.s. One Piece owned by Eiichiro Oda

Yuito Sparda Redgrave, son of the Legendary Devil Hunter Dante Sparda, must face a series of paranormal threats that endanger the safety of both human and supernatural kind. And worse, the most terrifying Holy Grail War. Together with his teammates, Jeanne d'Arc, Sieg, and Astolfo, a small group of elite paranormal investigators affiliated with the Armed Detective Agency must tackle the challenges that lie ahead and protect the human world from destruction. While facing the paranormal threat and Holy Grail War looming across the horizon, Yuito must also fight his way to save the girl he loves from the clutches of the World Serpent and the ancient enemy of his grandfather. I do not own Devil May Cry, Fate series, or any other from the franchise (such as Bayonetta, Bungou Stray Dogs, Demon Slayer, Sword Art Online, and Honkai franchise). All rights belong to respective owners.

A boy named Y/N L/N, who is Mark Grayson's childhood friend, lives in a world where monsters could level cities in an instant, people who could flu faster than the speed of sound, and figures from entirely different planets! And then there's him. A boy born into this world with nothing more than human Biology, living a normal life. Until the incident. Amber x Male Reader

The second book in my Harry Potter reader insert, give this a shot and I hope you enjoy it.

After the death of Gwen Stacy, Peter hadn't had the courage to become a hero again. Meanwhile, the Justice League were looking for a more experienced member to join the Young Justice and after the mysterious disappearance of Spider-Man, Batman assigns them to find and if possible, recruit him. Spider-Man will need to learn how to be a team player after most of the time, his friends died because of it. He gains new friends, relationships, and love. (This will be a mix of both Andrew Garfield's Spider-Man and Tobey's while still in high school)

Republic City never sleeps, and neither does 17-year-old doctor Y/N L/N. A medical prodigy with a sharp mind and sharper wit, he's earned a reputation as the city's youngest and most skilled healer. He openly uses Waterbending in his practice, revolutionizing medicine-but there's one part of his abilities he keeps hidden. His talent, used only to heal, could change the world... or destroy his future. Y/N prefers to keep his head down and focus on saving lives, but when Avatar Korra arrives in Republic City, trouble follows. From street brawls and rising tensions to dark forces threatening the balance of the world, he's pulled into events far bigger than himself. As war looms and enemies rise, Y/N must decide: will he remain in the shadows, or will he stand beside the Avatar and fight for the future of the world? "All writing that you recognize from the series The Legend of Korra is, of course, not mine."

in the year 2009, a boy was born. this boy was nothing out of the ordinary. for the first five years of his life that is. in 2014, the boy, unsure as to why, said he saw a monster. at the time, his parents didn't bother with it, and said it was just his imagination. the boy drew a picture of this supposed monster. and not even an hour later, the very same monster the boy drew was on TV. from that day, the boy, known as y/n, was now a part of something greater. he was the boy who had a Titanic bond with the King of monsters. Godzilla.

Adrian is a sixteen year old boy with an explosive personality. He is also unaware that his brother Troy is the Red Megaforce Ranger, or that his father and mother were once Power Rangers themselves. Things begin to take a turn for the worse when Troy is kidnapped, and no one hears from him for months. Also, his father Carlos Vallerte - who was once the Black Space ranger - sets out to find Troy and bring him home. Desperate for answers, Adrian gives into despair, but the rest of the Megaforce and Samurai rangers - unbeknownst to Adrian - try to help him, while at the same time protecting him from any form of evil that might try and harm him. Adrian learns shocking truths and ties that he never imagined, and learns he too has been chosen to be a power ranger, with powers beyond his imagination. Still, he is reluctant to accept such a weighty responsibility that he never asked for. But despite all the trials he faces, will his wild and untamed heart drive him to misuse his new abilities, and will he accept his destiny as a ranger? Or will he allow the evil he sees before him, make him walk away from his destiny, his friends, and his family?

After the events of Superior Spider-Man, Y/N was betrayed by everyone including his family, closest allies and lovers. He was belitted by everyone he knew and loved. He is sad and hates every single one of the heroes until he is given hope by Cassandra Webb and Doctor Strange and is given a second chance in an alternate universe. A new home far away from his universe.