It wasn't by mistake, or by some god, or by something as ever changing as this so called 'destiny' we all have, but ever since a young age a girl and a boy of different worlds have been connected. Every night, instead of dreams, they go to each other. Not by choice but forcibly. In that 'dream', if you could call it that, they fight until there is a victor, the winner gets to live another day, while the looser is forced to watch and experience what the other person does while there own world is put on a sort of 'pause' state. If they chose not to fight and try to stay in the 'dream' world, though, after a certain amount of time, the victor would be chosen randomly.
In a world where 80% of our population has powers called "Quirks" that range from thousands of abilities like super strength, fire manipulation, cryogenic generation, super speed and so many more, some chose to use their gifts for good who are called pro heroes or just heroes and some used their gifts for evil to hurt and rob people those individuals are called villains. There was a school made in Japan named UA to train and teach students how to use there quirks to save people and become heroes which has become the top school on the planet and many wish to attend and one of those is a guy named Jackson who dreamed to enroll in the UA to become a hero but little did he know that the goal would bring him another thing he's always wanted, true love and happiness with a girl.