Aizo was alone after he felt after a long time he became hateful towards the world. He had no life but his dorm and his classes he had no social interactions not even with his teachers/lecturers or classmates.
He felt kicked our by the world he felt betrayed those he loved most his friends and family never contacted him for a year since he said those curseded words to his brother.
Who would think a stupid lie could lose him his life. When he went home that day he had no food but he didn't care he just lied in his bed cursing the words he said that day. That horrid day.
Aizo woke up only once to get a glass of water but ad he went back to his bed he collapsed. He went into a deep coma a educator found him a few days later he was rushed to the hospital and hardly kept alive.
[He stayed in a coma for the following 5 years]