When kirito woke up , he still was exhausted due to high mental strain..
As he got up from bed.
He went to bathroom to have a shower...
After eating breakfast and he made a clone ,to attend the academy.as today wasn't any duals scheduled..
After an hour he went to the forest and started to make 10 shadow clone who went to train the jutsu he memorized yesterday..
And made another clone with little chakra to study the basic fuinjutsu he had copied down ..
He himself started to think how he should train now to get stronger as even if he trained continuously like this he could at most beautiful as strong as a low kage or an elite jonin by the time of 4th GREAT NINJA WAR..
He started to think of different anime's , mangas, and novels in which different power systems work differently and different ways to get stronger, among them he remembered a famous novel " THE BEGINNING AFTER THE END ". In which a person awakens a mana core and adds more mana particles to it and purify it little by little from dark to light colour through many stages..
Although the mana and chakra are different he could try to compress his chakra into a core and add more energy everyday which will slowly strength his body and increase his chakra ..
But he didn't went to directly try his idea ..
He started to write down his ideas on a note book in English and started to have many ideas like mixing the nature chakra/ energy into the core and enhancing it ..
After the day was almost over ,one of his clones came with a rabbit in his hands ,that his clone had hunted .
After cleaning and removing his internal organs , he started a fire and had his dinner their he returned to his apartment and one by one started to display his clones , many clones have already dispelled during the training due to using all the chakra ...
The next day he went to the academy himself and left his clone in the class and he himself went to the library for researching about human anatomy and chakra passage ..
Their were basic books their about human anatomy and chakra passage in the human body ..
He couldn't find more books their so he decided to venture into the hospital and search their ..
After he reached the hospital building he went towards the reception table and asked the nurse their about the hospital library but was informed that only medical ninjas could enter their
So he did the most basic things he left the hospital and did the transformation jutsu and entered the hospital and went towards a random direction after that he searched for the library room and found it their inside was a librarian.
He performed the sensory technique to inquire about the labrarian and found no ninjas their secretly guarding the library.
He entered the library smoothly by performing the concealment jutsu and went around to find the books he needed ,
After finding the books he performed the shadow clone jutsu and started to read the books and took notes on different importer points like tenketsu points ..
Afte finding all the knowledge he needed, he also copied all the available medical jutsus in the library ..
He left the the hospital and went to home after having dinner he slept
When he woke next morning he went to the FOREST OF DEATH after performing the sensory jutsu to locate a isolate place he found the same place team 7 was after orochimaru's attack.The tree with a cave at the bottom..
He entered the cave after performing the shadow clone jutsu..
After he sat down he start to mentally prepare himself and ordered his clones to try protect him ..
He started to try to gather all his chakra at his abdomen part and he had to focus very hard to do it as chakra was flowing throughout his body as he started to try little by little chakra started to gather but he couldn't gather most of the chakra
So after exhausting mentally he dispelled his clones and went back to his apartment..
After a week of continuous practice during which he had to sometimes attend the academy personally because of physical duels ,he was at last able to control all his chakra and gather it at one point..
On Sunday he went back at his usual location in the forest of Death ,he made 5 clones and then told them to protect him ,
After sitting down he started to gather all his chakra at his abdomen and started to compress it little by little (only because he had high chakra control) to form a chakra core , beads of sweat could be seen on his forehead ,
After being mentally exhausted he went back to his apartment and continued to compress his chakra little by little daily for almost six months.
After six months he was finally able to compress all his chakra,now he had to make sure it remained stable and he could add more chakra into it daily safely.
After another week he had finally completely made a stable chakra core in which he could now add more and more chakra or any other energy and slowly become stronger..
His chakra core was deep blue colour and he had always concealed his chakra ..
After making the chakra core his chakra increased tremendously as he started to daily pour more chakra into it..
As more and more chakra was poured into it it started to become dense and liquid like honey , he felt his chakra becoming pure and pure like as if previously some impurities had been their now those were gone and it felt more easy to control and the power of his jutsus became very high as his C level jutsus could now rival a B rank jutsu in power and he became physically more fit little by little (but it was very little like adding0.01 to 100 )
He also learned all the genjutsu , healing jutsus and ninjutsus he had memorized previously from the libraries ..
As he was training he got the memories of his clone which was attending the academy about the upcoming graduation exam at the end of this month..
He was soon going to start his journey as a ninja ..
He was also searching throughot the forest for any secret passages to locate any orochimaru's lab , as he knew orochimaru had built many labs throughout the village ..
He needed a lab for his future experiments
..