Maybe its a big spoiler but what happened to charlies parents?
Charlie's backstory time!!!! Okay SPOILER WARNING
After his traumatic birth and the incidents that followed (having a toddler with uncontrollable fire powers is hard), Baekhyun's parents immigrated specifically to protect him. Sadly, as their powers continued to grow and become more destructive with each attempt to suppress them, they caught the wrong eyes, and a mysterious organization decided to contact them with false promises of helping their child. In a moment of weakness they agree to let them keep him temporarily, just long enough to find a cure or train him to control it, but they realize pretty quickly after they get denied visits that they were lied to and start fighting to get him back.
Because of that, the powers that be arranged for their deportation and financial ruin so that they could never get their child back. And as of season one (In which Charlie is 20-21) they're stuck in Korea, getting treated like social pariahs. They are still looking for him with all the limited resources they have. Baekhyun's dad is also taking care of his disabled mom while the two of them hope and pray that one day they'll get their son back, or at least some form of justice for what happened. Baekhyun was too young and traumatized to remember his own name (hence why they go by Charlie), much less be cognizant of what happened.
Here's a picture from before things went horribly wrong:
They had it tough </3














