Catallic: Not human?

"What... Am I...?"

It was not a philosophical question. It was a plea, a desperate plea to believe this was just a dream, that he would just wake up in his bed with the relief of knowing the nightmare had come to an end

That day was a turning point in Teal Raud's life.

It started with a few clues: nightmares that were forgotten when he woke up, constant headaches and hallucinations, which he blamed on sleep deprivation.

As he walked out of school along with his friend, Van, he started feeling a sharp, burning pain in his left hand.

The sight of his hand left him stunned. He was looking at something that he never imagined in his wildest dreams.

To uncover the mystery surrounding his arm, Teal set out on a quest with his friends to find the reason and the person responsible for it.

As they started their investigation, they came into contact with some familiar names, some famous names, and some names they wish they hadn't known.