After Izuku found out that uraraka was cheating on him with todoroki, he told it to momo and both broke up with the them. A week had past and izuku and momo were framed by the LOV, nobody believed them and beat up izuku trying to protect momo to not get hurt. Not even All might believed his sucesor and took ofa awey from him, but they didn't know that betrayinv them was the worst mistake in their life.