//This chapter is a little bit rushed but enjoy.//
Sasuke was sitting on the floor in the dojo looking at the complete 8 inner gates technique. What he noticed that was different was in the scroll it stated in order to avoid certain death from the 8th gate, the gate of death, the user must strengthen his heart, veins, arteries and body with fire nature chakra. It states this because with every gate you open it will give you access to more chakra which will empower your body. This empowerment also has an effect of speeding up your blood flow which is why with each gate you open you get redder and redder until the 8th when you look like your turning on fire. But if you strengthen your heart, veins, arteries, and body with fire nature chakra your body won't turn to ash but the amount of heat from your blood will damage your body seriously a normal human will need a couple of years to recover. But for a devil maybe a few days or a week or two.
Sasuke then looked at the body strengthening technique he picked up. The scroll was actually a method to learn how absorb natural energy to increase your strength and fortify your body. The only thing is that natural energy is made out of the positive and negative energy of the world. The positive energy isn't really the problem the problem is the negative energy. Negative energy will corrupt the mind unless you have a strong will. Sasuke was reading the scroll when suddenly sakura-san appeared right in front of him.
Sakura-san: Sasuke-sama if you want to learn how to control natural energy and to not be corrupted it's easier to train your body with while absorbing the natural energy around if you can forge you body under extreme exercise it should forge your will at the same time making it harder for negative energy to affect you. This will also in turn strengthen your spirit which will make it easier for you to do touki.
Sasuke sat there and thought about it. He was sure that if he trains his body using a extremely watered down version of Gai's training while absorbing natural energy he should be able to keep his sanity. Also this will make his body more powerful faster and he will be able to open the 8 inner gates faster as a result. Sasuke just remember that his chakra level has finally made it to the low lower class which means he should be able to activate his sharingan. Sasuke then focused on his eye and he still just felt a inch.
Sasuke:{What the hell!! I thought i could be able to activate my sharingan by now. Oi I just remember i didn't try to put any chakra in my eyes I'm so stupid!}
Sasuke then sent some chakra to his eyes then the inch started to feel like a burning sensation. Sakura-san who was looking at Sasuke saw his eyes turn red and with a little transparent black ring with a single tomoe in it.
Sakura-san: SASUKE-SAMA YOUR EYES WHAT HAPPENED TO YOU?!?!?!?!
Sasuke: Sakura-san what do you mean i feel fine i mean there was a burning sensation but it disappeared but for some reason i could see everything more clearly.
Sakura-san:{Could it perhaps be a sacred gear?! But what does it do. Sasuke-sama said he could see more clearly but that shouldn't be it.}
Sakura-san: What else do you see or feel from your eyes.
Sasuke: I can see some blueish energy in your body and i can see how your every muscle move it feels weird.
Sakura-san: Can you turn your eyes back to normal.
Sasuke: Yeah i think i can do that.
Sasuke then stopped putting his chakra into his eye and they went back to normal. Sakura-san seeing this she was relived and told him to practice his sacred gear in secret.
Three years passed since that time and a boy who looks like he is 7 to 8 years old is doing push ups while standing on his hand upside down with a aura around him. He has black hair and black eyes and looks extremly handsome. This boy is Sasuke Sarutobi over the years he was able to open 2 out the 8 gates and he was also able to use touki from converting the natural energy he gathered in his body into fighting spirit. This year he is 7 years old and he wanted to go live in Kuoh town so he had Sakura-san buy a medium size house and he want to go to a normal elementary school instead of continuing to be home schooled plus she will be his guardian until he is 16. He decided this because he remembered he could meet Irina and the new Issei and befriend them as a child.
Sasuke: {With this I'm gonna have to double up on my training or the 5th gate isn't gonna be opened on time.}
Sakura-san: Sasuke-sama everything is ready its time to go.
Sasuke then went with Sakura-san to the family's car and followed the movers truck that he had all the things he wanted to bring with him many some techniques and tools.
I decided to flip it to the english way of saying his name you now first name first last name last.
Also let me know if you want me to add anyone besides rias and her peerage