Title at the end

'Is it because of the skill?' thought Aiko staring at his reflection.

"Aiko-kun, what exactly happened?" asked Minato, bringing him out of his thoughts.

"I tried analysing the seals with my chakra and absorbed yours from the Kunai, then this happened" said Aiko trying to explain it without bringing in the existence of the system.

"You absorbed my chakra?" asked Minato, trying to conform once again and seeing Aiko nod his head, fell into deep thought.

'His chakra signature has basically became identical to mine and his change in hair and eye colour, is this some kind of bloodline limit?" thought Minato analysing the situation, but he actually couldn't think of any bloodline ability capable of doing it.

"Aiko-kun do you feel any changes in your body?" asked Minato looking at the boy with a bit of concern, not knowing if this had any side effects.

"I don't know, I don't have any ill feeling, but it's like our chakra is resonating with each other," said Aiko his voice calm, as he moulded chakra, and he also told him about his experience during teleportation, Minato's mark had also changed in his mapping skill, it was now showing golden colour.

Minato had a surprised expression as he listened to the boy, 'Did his chakra react when I activated the jutsu?' he thought.

"Aiko-kun let's try it once again, concentrate on that feeling and don't worry I will be with you" said Minato a bit excited as he placed his hands on Aiko's shoulders again.

Aiko nodded his head activating his instinct manipulation and increased his reflexes and senses to the maximum.

Looking at Aiko, who seemed ready, Minato used Hiraishin again, but this time he slowly activated his seals and felt Aiko's chakra spike in accordance with his.

Aiko also closed his eyes and carefully observed his and Minato's chakra circulation and once again felt his senses expand and realised that there were 50 blue marks distributed all around konoha and soon one of them glowed and he got sucked into it along with Minato.

He opened his eyes, feeling the cold wind of the night caress his face and realised that they were standing near the entrance of a cave located at the outskirts of the Konoha.

"So, Did you feel it?" asked Minato, a bit excited.

"Yes" said Aiko, nodding his head and sharing his experience.

'Hmmm, the way he perceives the jump points are different from mine but the overall feeling is similar' analysed Minato feeling happy that finally someone could use the jutsu to the same level as him.

Minato had developed this technique after getting inspiration from the second hokage's technique, learning about Fūinjutsu from Kushina and summoning from Jiraiya, so it can be said as a technique that was very special to him. But, it was after creating it, that he realised why there were so few users even though the second hokage had created the basic version decades ago.

It was because people had difficulty perceiving space-time related things as it can't be directly felt by the senses and he even thought he was quite lucky to have realised it intuitively.

Even among his disciples, there was no sensory type ninja and the people in his guard group had also failed to learn it individually, so when Aiko could sense the jump points he was excited that Konoha could get another hiraishin user.

"Aiko-kun, what you sensed just now are what I call 'jump points', the areas where I have placed the seal, like this cave" he pointed at a seal similar to one on the kunais, which was engraved on the side of the cave wall.

"Oh.." muttered Aiko realising the application of the seals in the technique.

"Now, you try to take us back home" said Minato looking at the boy, "You just have to concentrate on which point you want to go after sensing them and you will be there." he added encouragingly.

It was actually quite dangerous to try it alone as the user has to be careful as to in what position they are going to appear from the seal and it would require a high level of reflexes and spatial awareness to actually use it in the battle, but now that Minato was there with him, he could actually help Aiko in fine tuning and reduce the small mistakes he would make.

"Ok" muttered Aiko, a bit eager to try and poured his chakra into the kunai he was holding and once again he sensed the marks, and focussed on the mark from which he had teleported here and surroundings changed and he found himself in the basement of the mansion standing above the tile which had seal on it.

"Very good Aiko-kun, you have succeeded in your first time" said Minato pleasantly surprised as it had taken him a lot of tries to get it right and he had not dared to teleport himself from the beginning and he had practised with objects and only after gaining proficiency in it did he use it on himself.

Even that was an impressive feat as there wasn't anyone to guide him the way he was guiding Aiko and help him in sensing space nodes as the only resource he had was the jutsu left behind by the second hokage.

"I thought you guys were in the garden, what….?" Kushina trailed off as she entered the basement, she had come to check as she had heard Minato and Aiko's voice.

"Aiko-kun?, what happened?" she asked, shocked as she looked at the familiar yet unfamiliar boy.

"Kushina-chan let's discuss in the living room" said Minato as he also had some questions he wanted answered.

.....................................

"He absorbed your chakra and became like this?" asked Kushina surprised, once the situation was explained to her.

The trio were now sitting on the sofa of the living room and the atmosphere was a bit serious.

"Kushina-chan do you know whether the Uzumaki clan had any kekkei genkai?" asked Minato, trying to confirm his theory.

"I..I don't think my clan has any kekkei genkai ability" said Kushina frowning as according to her knowledge there wasn't any mention of such things in the clan records.

"Minato, do you think it is a kekkei genkai ability?" she asked, her voice filled with uncertainty.

"Hmm, only that explanation makes sense, maybe it is a rare one like lord first's Mokuton?" said Minato, he too did not have much information to make an accurate judgement.

"Now the problem is we don't know if it is a temporary transformation or a permanent one" said Minato, looking at Aiko.

Aiko glanced at the timer which was at 15 minutes 10 seconds in the corner of his vision and spoke "I have a feeling that it will not be permanent."

Minato looked at the boy who was calmly sitting on the sofa and wondered if he knew more than he was telling them as the boy seemed unperturbed by his situation and actually looked calmer than them.

"Kushina-chan pour some of your chakra into Aiko-kun's body, let's see if he can absorb yours too" said Minato, planning to test the limits of this ability.

Title: 21. Using Hiraishin