Fugaku positioned himself between Jiro and Duy while Teuchi sat at the side to observe the fight. After they formed their respective seals of confrontation, Fugaku dropped his hand down indicating for the spar to begin after leaving from the middle.A cloud of dust rippled outward after Jiro and Duy both rushed at each other. They collided in the middle of the training ground. A couple of Uchihas started to walk over to the arena, after they saw that the second son of the clan head was engaged in a spar against a fellow ninja. Soon a small crowd of Uchihas began to form around the arena.They were aware that Duy was a dear friend to the future clan head so they kept the comments about his green tracksuit and bushy eyebrows to themselves.
Jiro ducked under a punch that Duy threw while redirecting Duy"s fist upwards. Duy"s armpit became exposed so Jiro threw a jab into that area while it remained unguarded. Duy stumbled a bit after taking the hit, but he pulled his guard even tighter forcing Jiro to dodge around while tearing Duy"s defense apart after Duy would attempt to attack. The crowd saw Jiro dancing around Duy with ease and it seemed as if Jiro knew how Duy was going to move before he did it.
Eventually, Jiro grew bored of the pattern so he decided to end the fight. Duy had a great guard, but his attack was lacking very badly in Jiro"s opinion. The rest of the Uchiha watching were in shock at Duy"s ability to take hits as well as deal them out. However, they did not find it to be a surprise that Jiro was taking Duy apart in every turn of the fight. It was only natural for an Uchiha to be better than a non Uchiha.
Jiro once again ducked under a punch sent by Guy. Instead of redirecting his arm, Jiro grabbed onto Duy"s wrist and pulled him to the floor while simultaneously leaving Duy"s arm in an arm lock forcing him to either give up or have his elbow dislocated. After Duy gave a sigh signalling that he would surrender, Jiro let go and then helped to pull Duy up.
After pulling Duy up, he realized that Duy was leaning on his arm way too heavily for it to be just being tired. It was much more long term like a lack of sleep. Jiro suddenly grabbed Duy"s face and turned it towards his head to look into his eyes while the sharingan was activated. The crowd of people did not know what was going on nor did Fugaku and Teuchi who were staring in horror at Jiro.
The crowd immediately dissolved into a mix of whispers and gasps as the gossip monger within any person immediately awakened. Talks about Sarutobi being rumored to be gay were coming back again with a vengeance. As far as the Uchiha knew, Jiro did not seem to be gay, but his sensei was once accused of being gay by his own male student. To the Uchiha, it made perfect sense, give a gay sensei an impressionable male student and that student will quickly turn gay.
The crowd quickly disappeared after Fugaku glared at them. Fugaku then ran over to Duy and Jiro while Teuchi was right next to him. As Fugaku and Teuchi arrived, he noticed that Jiro"s sharingan was active and Duy was under a Genjutsu. He quickly rushed over to his brother in confusion and shock at his action.
Jiro ended the Genjutsu after he got the necessary information from Duy. He turned to Fugaku and Teuchi intending to explain his actions, but seeing the shock on their faces gave him a good idea.
"I was just checking to see if he was gay."
After making sure to memorize the look of pure unadultered shock as well as the hints of horror, Jiro decided to end his prank. Jiro explained that he was checking the amount of sleep Duy was getting on a daily basis. As Jiro was explaining to Fugaku and Teuchi that Duy was rarely getting a good amount of sleep in order to practice his taijutsu technique, Duy slowly got rubbing his head. While Duy was still trying to recover from the Genjutsu cast on him, Fugaku and Teuchi started to berate him on his lack of sleep as well as not going to them for help on the Taijutsu technique he wanted to develop.
As Duy was cowering away from the uncharacteristically angry Teuchi and the overbearing Fugaku, Jiro began to walk away, his mind occupied by the technique that Duy was focusing on. Duy did not name them yet, but the technique was about overcoming the limits of the human body. Jiro liked the sound of it as well as its potential, but there was an extreme backlash in using the technique which was a major downfall to the technique.
Jiro continued to ponder on the technique. Duy hadn"t named it yet, but its ability to overcome the innate limits set by the human body was something alluded to many times in science fiction. It seems that in this world, the brain isn"t at 100% from the start meaning that it can improve. Duy"s technique would have a major backlash different from the minor backlash people might gain from using the body refining technique. Jiro was thinking about how he could modify the technique in order to make it much more user friendly. As he continued to walk, Jiro unknowingly came in front of his house. He entered in and after greeting his mother he continued to walk towards his room, but he noticed that Duy and Teuchi were also here.
Duy had explained the very basics of his technique to Teuchi and Fugaku.
"The most important part of this technique is literally about breaking past the limits your body set for you. That means that you have an excessive amount of chakra flowing which would damage your body from the backlash."
Duy continued to explain, but the door to Fugaku"s room opened as Jiro walked in and sat down gesturing for Duy to continue. After Duy finished his explanation, Jiro indicated for everyone in the room to get up and led them out to the private courtyard with a training ground for the head family. Jiro turned to them with his sharingan ready and activated, three tomoe were faintly circling around.
"Duy, I want you to activate the bare minimum of your technique so I can see how it works."
Duy looked ready to activated it, but he gave a forewarning to his friends before going ahead.
"Guys, after I activate, I will probably faint from exhaustion once I deactivate so don"t worry about me."
Jiro waved his hand for Duy to continue so Duy took in a deep breathe to prepare himself. When Duy launched his technique, Jiro saw a chakra point in Duy"s brain open forcibly to allow chakra flow in a different pattern. As Duy showed off how the technique could remove the natural limiters the body set on itself, he fell over in exhaustion.
While Duy was in the guest room of the Uchiha household, Jiro was going over what he observed with Duy as well as what memories he saw using the sharingan. Duy was using the technique in his brain resulting in a larger chakra point getting opened up. At that point, with the sharingan, he could not see how the chakra interacted with Duy"s body or how it exactly worked, so he needed to get some help from either a chakra sensor or a Hyuuga.