Katagishi remembered that burning feeling in his eyes, so he goes home and into the bathroom then Katagishi tries to recreate the feeling and sees his eyes turn red and have a purple rectangle in the middle. Katagishi recognizes the eyes and knows that it is Ketsuryūgan. Katagishi then grabs out a kunai and cuts his finger and then tries to manipulate the blood and creates a new jutsu Ketsuryūgan: Shukketsu nashi (Ketsuryūgan: No bleeding) that makes all wounds not release blood. Katagishi then walks to the academy and sees Itachi.
"Hey, are you ready for our duel today." - Katagishi
"Okay, we will duel after school. Also, I am sorry for being rude to you a few years ago, and I believe we can learn from each other." - Itachi
Katagishi got put into class A and the first day of school was just the third Hokage talking about the will of fire and great sacrifice of the fourth Hokage. Then the rest of the class was about the basics of ninja history and how to sense chakra. The sensing of chakra was useful for Katagishi because he was never taught it. Katagishi waited lazily for the rest of the school day, then after the school finally ended Katagishi went with Itachi to the sparring area of the school.
Katagishi and Itachi then did the seal of reconciliation and began the duel. Katagishi decided he would only use taijutsu. Katagishi rushed forward and kicked Itachi so fast he could barely block it. Itachi then tried to punch Katagishi, but Katagishi easily avoided it. Then Katagishi did a low kick and tripped Itachi and grabbed out a kunai and put it to Itachi's throat and said that he won. Itachi then gave up and both of them made the seal of reconciliation.
The next week at the academy passed in basically the same way and Katagishi decided that it was time to attempt the graduation test because he felt he knew everything important being taught in this school. So Katagishi went to his teacher at the end of the first class and asked if he could do the early graduation exam. The teacher asked Katagishi if he was not joking and then Katagihsi said he wasn't. So the teacher gave Katagishi a written test, which he easily answered in ten minutes. The teacher then told him to go outside and to throw five shurikens on the targets. Then Katagishi throws the shuriken and hits the center of the target. After this, the teacher says there is one more test and Katagishi has to perform Bunshin no Jutsu (Clone jutsu E-rank) and Henge no Jutsu (Transformation Jutsu E-rank) which Katagishi did easily.
Seeing Katagishi do everything easily the teacher is surprised and goes to report it to the third Hokage. The third Hokage is surprised to hear this news and makes sure this doesn't get to Danzo's ears. The third Hokage then goes over to the academy and talks to Katagishi
"Young Katagishi, you have graduated from the academy in a week and have now become the fastest person to graduate from the academy. Since you are so talented, would you like to become my disciple because we do not have a jounin team leader for you and a chunin team leader would waste your potential." - Third Hokage (Hiruzen)
'Becoming his disciple will be useful to protect me from Danzo' - thought Katagishi
"I will become your disciple, but only until I can take the chunin exam." - Katagishi
"The first jutsu you will learn is Kage Bunshin no Jutsu (Shadow Clone Technique B-rank) So that you can learn other jutsu a lot faster by using clones, but this jutsu shouldn't be used in a real fight because you don't have enough chakra." - Third Hokage (Hiruzen)
After this Katagishi goes to Nasho (Mom) and Masuno (Dad) and tells them that he has graduated and become the Hokage's disciple. They were both greatly surprised and ran to the Clan head (Murakumo) to tell him. After the Clan head (Murakumo) knew Katagishi already graduated he wasn't surprised and told Katagishi's parents that he is nearly chunin level in strength. Hearing all this news Nasho (Mom) and Masuno (Dad) almost fainted because Katagishi was only six years old.
Then Katagishi reads the scroll for the Kage Bunshin no Jutsu (Shadow Clone Technique B-rank) and Katagishi notices that it is similar to the Bunshin no Jutsu (Clone jutsu E-rank) and so with the Third Hokage (Hiruzen)'s guidance it only took Katagishi three days to be able to use the jutsu. Because Katagishi is the Third Hokage (Hiruzen)'s disciple he was allowed access up to B-rank jutsu in the hidden leaf.
So Katagishi decides to find the Mizu Bunshin no Jutsu (Water clone technique C-rank) and Kirigakure no Jutsu (Hiding in Mist Technique) and with the use of his Ketsuryūgan he makes Ketsuryūgan: Ketsueki Bunshin no Jutsu (Ketsuryūgan: blood clone technique B-rank) which makes a clone that can absorb the blood of enemies and uses to regenerate other than that is the normal Kage Bunshin no Jutsu (Shadow Clone Technique B-rank) and Ketsuryūgan: Chi no Kiri (Ketsuryūgan: Blood Mist C-rank) which makes a three-meter blood mist that when inhaled they get put into a genjutsu.
But the jutsu took a week to learn because Katagishi got no help from the Third Hokage (Hiruzen). After all this time Katagishi started to get bored with only training and did five D-rank jutsu and got 350,000 Ryo. With this money, Katagishi bought a hundred chakra metal senbon that Katagishi could fix any damage like the executioner's blade by absorbing iron in enemies' blood. Katagishi also made another technique in which he could combine the senbon into a needle sword incase of being forced into taijutsu combat.
After getting the needle sword, Katagishi asked the Third Hokage (Hiruzen) to train him in using the needle sword because even though the Third Hokage (Hiruzen) doesn't use a needle sword he is a lot more skilled than Katagishi with it. The needle sword took Katagishi a month to be able to use it in an actual battle. Also whenever he wasn't training with the needle sword, Katagishi would do physical training to increase chakra, so that he doesn't have a lot more spiritual energy compared to physical energy. Then Katagishi asked Third Hokage (Hiruzen) how to teach him the basics of Fuinjutsu.
Do you guys like how I made him Thrid Hokage (Hiruzen) or should I just make him a super young anbu and the same stuff happens except Katagishi will have to go on more dangerous missions in the future. If you guys wanted the academy to be longer I could move all the stuff after the graduation and instead explain war strategies and other side things.
If you guys find any problems or anything you would like me to add in the future then comment it.