One day while heading to class, Izuku was suddenly attacked by majority of his peers under the belief that he betrayed Union by handing over information to the League Of Villains and the White Fang.
The ones who knew Izuku would never do something like that in a million years were Team R.w.b.y, J.n.p.r, C.f.v.y, Momo, Kyoka, Kirishima, Denki, Shoto, Tokoyami, Koda, Midnight, All Might Glynda, Winter, Ozpin, Shinso and his little snowball daughter.
Sir Nighteye then took OFA from Izuku using a machine he had made and gave it to the villain in a hero suit, Katsuki Bakugo when in reality the pervious OFA users only let Nighteye take a small percentage, but big enough to make him believe he took it from Izuku as he was then transported to an Atlas prison.
However, what most of them didn't know is that Izuku is the son of Steve Rogers and Natasha Romanoff, and twin brother of James Rogers, which Ironwood was well aware of.
Though word of Izuku's false imprisonment quickly reached both the Avengers and the X-Men, as both teams were beyond pissed that Izuku was falsely imprisoned, his parents and brother being the most notable along with his godfather Bucky Barnes, as both teams quickly worked to free Izuku.
And due to his enhanced endurance and interference from Winter, Izuku was able to endure his false imprisonment relatively easily though one day after training, he passed out due to exhaustion and in his mindscape, he saw the pervious OFA users and to his surprise, the brother gods.
The pervious OFA users then told Izuku of their little deception, which was a failsafe incase OFA was ever given to someone who didn't deserve and told Izuku that the future of OFA is fully his to decide and that he has to kill both All For One and Shigaraki, something Izuku had no objection to while the brother gods asked Izuku to end the war between Ozpin and Salem, knowing that the son of Captain America could do the impossible which Izuku accepted.
Eventually, Izuku was proven innocent by the Avengers, X-Men and the huntsmen and huntresses, but the 'heroes' under the hpsc all hated Izuku and wanted him to remain imprisoned, and Steve fully knew Ironwood wouldn't give up his son so easily.
Which led Steve to form a plan where himself, Bucky, Cyclops, Wolverine, James and a few of Izuku and James' friends would break into the prison to save Izuku, which went off without a hitch.
After being freed, Izuku learned that everyone who believed him all left Union out of sheer principle as they, Izuku, James along with the children of the Avengers and the X-Men formed a new team and wages war against everyone who betrayed Izuku.
Harem:
Rogue
Laura