As the child Kirito grow with time and came at age of 5, The Asura (The First Demon) awake from its deep slumber and seal was cracking when Asura opened his eyes he was locked in the boys body he shouted "Damn you Nobunaga!" He tried to break free but he couldn't do anything other than watching what child was doing through connection of mind but he was not able to take control over boy.
Kirito was ready to go for his first day of School,
Shinobi school was on top of a mountain as he reaches the school building it was a magnificent building carved in Tomba tree (a large tree about 40 metres tall) and their he saw many Boys and girls going to school, A boy with red hair sprinting and passed Kirito that made Kirito excited he fallowed the boy, Kirito was a freshmen so he joined Class 1 when he entered the room class was already full with people taking with each other some even playing their Kirito saw that red hair boy sitting quietly at the front with know one near, Kirito came and sitted near that boy to which boy looked at Kirito and didn't say a word.
Soon a man in black outfit (ninja outfit) came in class everyone stand in respect "Good Morning Teacher" every last one shouted with this Man told his name "Hello students I am Hattori Han Your home room teacher, so then sit down" As the class begin the first class was the Breathing techniques Class in which a Shinobi learns to control it's breath to cast energy for Shinobi Arts (Collection of different techniques and powers which works in return of breathing energy) A teacher was Hattori so he started "everyone we will learn about breathing energy, so any of you can tell me what Breathing energy is?" everyone went silent but the boy in red hair stands to answer " Teacher, Breathing energy is fuel to use any Shinobi arts" although answer was simple it was good answer so Hattori smiled "Yes you are right Mayo-chan" everyone clapped for her and Hattori explained the connection between breathing energy and Shinobi arts "Look children Breathing energy is not all about how you control your breath it also depends upon the Tâ-pâ energy (Bloodline energy) which difference from person to person" For Kirito this experience was new and exciting, Asura on the other hand was bored with this situation and shouted "Die you mere child" and with explanation of Breathing energy Hattori finished his class and ended the first day.