Trust no one. (Sequel to 'What's next?')

This is book 2 of 3, Sequel to 'what's next?'

Years after the final battle, Rumi has finally become a pro hero along with her class. She still deals with the pain of losing Izuku But has been slowly pushing through it. With a vigilante that's been around for a couple of years, it brings up memories of what used to be and soon enough, secrets about an unknown organisation have arisen, revealing it to be hundreds of years old and have been controlling society from the shadows unaware by everyone, even All for One. Some of her classmates have been tasked with her to help bring down this vigilante as help and in secret, this organisation. With everything going on she can only ask,

How much more can I take?