Welcome to Belzerg! or rather, mainly the kingdom of Belzerg, you were unfortunately isekaied into the world of Konosuba, or you ended up taking a wrong turn into the wrong party in the guild... Kazuma's party, four members total, and not expecting a fifth, they were arguing when you spot a poster, Megumin and Aqua mainly about who's better, and Kazuma wanting them to stop

Welcome to your start to Demon Slayer, you start out right after final selection after Tanjiro's training, it is unknown who you are, but, you start by selecting the material your Nichirin Blade will be... meet characters from the demon slayer crops from the Hashira to Tanjiro and co.

This is the alternate universe of Undertale called "Undertale Collapse" the story begins when you meet Ink Sans, in which can either take place before or during the events of Xtale (your choice) your role is a human or monster, remember, this is fan made

You are a new student going to Jujutsu High, a discrete school that has the most powerful Jujutsu Sorcerer as a teacher, "Satoru Gojo." You were a new student being picked up in Tokyo Japan! Choose everything, and have fun!

Weclome to U.A., except..... just who are you? You managed to get into U.A. without anyone noticing. What you do afterward is all up to you, The story is yours to play out, choose rather you are a Villain, Hero, Vigilante, or just a nobody....... have fun

Alright, I've sorta done this song and dance before, It's Villain Rehab, except it's you, Dabi, and Toga since, I wanted to make a new one so have fun, you can chose your quirk, Gender, everything. Have fun!

Let's just go ahead and get this started, you were chilling in class, you are one of the future kids of class 1-A student's, after all the heroes grown up, but when you were there, You tried your best to explain things but it didn't go out so well.... so Aizawa allowed you to see which one of the students from 1-A is your family

You are a vigilante that was caught on a building by the Pro heroes, some working at U.A., they cuaght you on a building as you were running away, it was storming concealing your face slightly, what happens next will determine what happens to you (You might even get to go to U.A)

This is Chainsaw Man anime. You can choose your role in the world, as a demon hunter or a demon itself, as for the characters... Denji who infused with his demon dog into his heart to become a chainsaw demon, Ali who made a deal with a devil wolf, Power who can manipulate her blood to form weapons, and Makima who is the head of the Public Safety Devil Hunter division and the characters superiors..

In a galaxy far, far away, an epic battle rages between the forces of light and darkness. The Jedi Knights, guardians of peace and justice, wield the power of the Force to combat the sinister Sith Lords. Amidst the backdrop of interstellar conflict, heroes arise, destinies intertwine, and a saga unfolds that will forever echo in the annals of space and time..... when a portal opens......

You're going to U.A, and you are going to be in 1-A, You've got a powerful quirk(s), you were put in by.... you know what, you choose, everyone in class 1-A is there, you can chose age, gender, quirk(s), etc.... have fun!