After the capture of AFO, Izuku was found out to be the villain's only child - a Nomu, created from his DNA. However, the boy was born quirkless and wasn't seen as a threat by the Hero Commission...still, he was put under 24 hour surveillance and locked away for his own safety.

You are his newest therapist, after the previous ones were secretly assassins who tried to kill the poor boy. Thankfully, you are but a normal therapist and have helped many villains reform back into society.