Fallen feathers

The young adult, Zario, just turned 18. He started seeing big differences in himself...not only did he get stronger and faster but he also might have gotten some sort of super powers. The sudden change scared his adoptive family so they sent him to a special school, Cross of New Castle, which is meant for students who need to be on supervision for 24/7. As he gets more memories back he realizes that he is not a human...
But these memories come back with one persons help.