Catching your girlfriend cheating is something, but to get framed as the traitor of U.A is something else. Losing All of his friends, his new girlfriend, his quirk, which Izuku worked his ass off to prove he is worthy of, but everything's down the drain just like that, being sent to the worst prison imaginable. The only person who believed he's innocent and helped him in The way? His brother. His brother learning he lost his quirk, told Izuku everything about his dad who he has never met, and the untapped potential he has for being blood related to the strongest creature on the planet.

A portal opens up in front of Goku and Vegeta. Of course Goku wanting an adventure jumps through without thinking twice. Vegeta tried to follow through but portal closed before he could. Now Goku is in a world where people have power or quirks as they put it

Izuku always thought heros lived in the light All his life, he saw heros shining bright like the sun, blinding out criminals. But after one terrible day, he had a revelation. The corrupt live in the light, but the betrayed live in the dark. He finally understood, he understands now. Heros don't live in the light