Aizo might seem like a prodigy but he had a bad side. More than you can imagine was Aizo capability to destroy the minds of others. He was evil incarnate but his heart cried out for him to stop Aizo knew one day he would have to chose between his mind and his heart that day would come sooner than he expected just 6 years after he joined Nul at age 16 (Nul teaches students over 10 subjects all non optional till there 12th year most Nul students would be educated for 20 years at finish there education in there 30s-40s).
Aizo met a man he was hurt not physically but mentally.Aizo had started to talk to the man he had no ill intentions like he normally would. He saw this man was really hurt he asked not what happened. He simply tried to bring joy to the man telling him jokes and making small talk when the man smiled Aizo felt achievement. To him it was a game life was a game after all to him but this was his 1st step towards humanity.
2 years later when Aizo turned 18 he would fall in love with a beautiful young girl called Mika and that's were our story starts