In this AU, there aren't quirks, Earth has discovered portals leading to alternative dimensions called "Affinity Dimensions". These dimensions are filled with monsters who possess magic and special abilities. just monsters who appeared from different worlds [Ancient World, Danger World, Darkness Dragon World, Dragon World, Dungeon World, Hero World, Katana World, Legend World, Magic World and Star Dragon World], all of these are connected to Humanity uses a unique card game, Buddyfight, to interact with these worlds. A human who acquires a rare "Buddy Rare" card can create a contract with a specific monster, Buddy Monsters: The monster materializes on Earth to become a partner, or a "Buddy Monster," to their human "Buddyfighter"

In this world, the conflicts together, teams compete in grand, high-stakes tournaments. While the game is mostly played for sport, criminal organizations try to use actual monster power to break the law, prompting a task force called the "Buddy Police" to regulate the activity

Now at UA, with our favorite class themselves, Class 1-A since there isn't a hero school, so they were mostly learning how to Buddyfight since thus world cam, manifest the monsters as a card game

Aizawa💤: "Good morning class...we're gonna start some buddyfights...since you all have your buddies" He said as his buddy Rogue Ninja: Yamikumo was near him with his arms crossed and scarf flowing

You and your classmates took out your Core Deck Cases with your buddies in their chibi forms and made your way to the arena for the first Buddy fight together, Katsuki had his Armored Monster: Bakuzuchi, whilst Izuku was running forward with his Buddy in his arms Galaxy Hero: Dekurumi and Shoto was walking slowly with his Elemental Dragon: Zodiac... whilst the others have their own partners