6 months later

A figure of a young boy was seen on a desert, sitting cross leg and on his knees is a katana with exquisite design. He stood up and slowly unsheathes his sword and said

[All things in the universe, Turn to Ashes, Ryujin Jakka]

The blade of his sword turned red and an extremely hot red-orange flames came out of his sword, flames appeared around him and the temperature around him was quickly rising. No kidding the flames of his shikai can reach up to 6,000 degree Celsius, the temperature of the surface of the sun, the sand on his feet was quickly melting and turning to ashes.

"Finally, I already activated Shikai" said Haru in an elated voice

He is pretty looking forward to this day in which he can activate his shikai, he can now defeat super-kage level ninjas with ease and he can contend and pretty much win if his opponent is the sage of six-path.

"Now I'm already set, my sage body is now complete and I can enter and exit sage mode whenever I want and my physical strength was increase by leaps and bound, my phoenix bloodline was completely manifested 3 months ago, I am now immune to any physical attacks and can manifest phoenix wings, well I pretty much enjoyed flying in the air. My chakra reserve is already at the peak super-kage level"

"My observation haki advances when I completed my sage body, I can now foresee 5 secs in the future and my range limit is at 10km, as for my chains I can pretty much conjure it as many times as I want."

"The only thing left for me is to reach grandmaster in swordsmanship, I just needed that inspiration for me to breakthrough" said Haru

While he was thinking, his necklace glowed red. When he saw this he was shock and notice that it was Kakashi's signal. 

When he thought what could have happen to Kakashi since Kakashi is already strong enough to contend against a Kage-tier ninja and if he can't win he can escape due to his shunko.

Then he remembered a scene in the canon in which Kakashi, Rin and Obito went on a mission. When he remembered that scene he had a bad feeling. He quickly sheathed his sword back to its scabbard and all the flames around him disappeared, he then uses Hiraishin jutsu to quickly go to Kakashi.

And sure enough when he got there, he saw Kakashi with a bondage on his left eye, Obito was lying on the ground with a huge stone on top of him and on the verge of death he also saw Rin crying beside Obito.

Kakashi saw Haru and quickly went to him

"H-haru Obito please save him" Kakashi said while crying

Although Kakashi was cold towards Obito he considered Obito as his best friend. Haru also considered them as his friends so he quickly went towards Obito and look at his condition. He notice that his pulse is already weak, his eyes were close and bleeding, he then look at Rin who was crying and said 

"Stop crying Rin, I'll save Obito"

"H-haru, please save him please" cried Rin when he saw Haru and hope reignited in her heart

Haru then activated his sage mode then made a shadow clone. He instructed the shadow clone to lift the rock at the same time he activated his healing jutsu. The clone nodded and prepared itself.

Haru quickly manifested his bloodline and a silhouette of a phoenix was seen behind his back he formed his hand signs [Phoenix secret art: Rebirth by flames technique], A golden flames envelope Obito's whole body and it quickly regenerates his body with a speed visible to the naked eye. 

If you are wondering, Haru combined his Time and space healing spiritual arts with his phoenix flames to maximize it's effect. 

Haru nodded towards his clones and his clones quickly move away the rock that was pressed on top of Obito. And Obito's right side which was smashed by the rock was quickly healed. 

After a while Obito's whole body is fully recovered, Haru stop his jutsu and checks on Obito, he felt Obito's pulse and that he is only sleeping. He sigh in relief and turned towards Rin and Kakashi and said to them 

"He is fine now, he is just sleeping"

Rin saw how Haru miraculously healed Obito's injuries and was shock but she quickly compose herself and went to Obito and held him.

"Thank you Haru" 

Haru just nodded then said "let's quickly get out of here before more enemies arrive." 

He then went to them and told them to held his hands, they held his hands and Haru touch Obito's body and quickly teleported back to Konoha's borders in his hide out, his clones already disperse itself.

He then said "Rest here for a while"

He then turn towards Kakashi and look at his wound and contemplated really hard. 

Kakashi saw Haru's confuse face and he quickly hug him.

"Stay right here for a while please" said Kakashi to Haru

Haru understanding Kakashi's emotions hug him back. since he experience the feeling of nearly lossing a friend.

They hug for a while until Kakashi calmed down his raging emotions. He then said to Haru "Thank you Haru for always being there for me"

"Kakashi no baka, Remember that I am always here for you" said Haru

Kakashi tightened his embrace on Haru and after a while he let go. And ask 

"Why are you looking confuse a while back" ask Kakashi

"Because I don't know what to do" said Haru desperately

"To do about what?"

"Well I don't know if I would heal your scar on your left eye or just leave it as it is" said Haru

"Huh? That's it? Then just heal it" said Kakashi confused about why Haru is deciding not to heal his scars

"Well it's not easy as it sounds okay, You look manlier when you had a scar on your face, it adds to your charm but if you don't want it then I guess I'll just heal it." Said Haru while raising his hands to heal Kakashi's scar

Kakashi hearing Haru's reason quickly grab Haru's hand and said "Wait! Wait! Wait! I don't think it's bad to have a scar so just leave it"

Haru laughs at Kakashi's antics and said "Hahaha okay suit yourself, but I'll still heal your wounds don't worry I won't touch your scar I'll just mitigate the pain" said Haru

Kakashi nodded and Haru checks up Kakashi's injuries and mitigated the pain. After a while Haru said

"Can I see your left eye?"

Kakashi then opened his left eye, in his eye a 2 tomoe sharingan was there, Haru then observes Kakashi's chakra and notices that the sharingan is consuming large amounts of it. He then look at Kakashi and said

"Kakashi I'll seal your sharingan for now, since it consumes large amounts of your chakra and its doing more bad to your growth than good. Don't worry I'll develop a seal that you can use to your sharingan, I'll make it so that you can only activate it if you willed it." Said Haru

Kakashi just nodded and then look at Obito and ask "How about Obito's sharingan I can just gave it back to him"

"Oh you don't need to do that, I regenerated even his eyes, you see my healing technique is totally different" said Haru with a smug face

"Oh Okay then I believe you" said kakashi

"Just like that? You believe me just like that? You won't ask how or why?" said Haru

"Well I always believe in your abilities since you always surprise me and you would tell it to me if you want to" said Kakashi

Haru blush at what Kakashi said and say

"Fine I'll tell you"

Kakashi perk-up and listen to Haru

"My healing jutsu is different because it uses the concept of time and space with the help of my flames regeneration ability and its vitality it then rejects reality or it rejects the phenomenon that the user don't want. 

In other words, I use the element of time and space to bring back the time before the phenomenon happened in this case before Obito got injured and together with my flames regeneration it brought back Obito's body parts by using the vitality of my flames."

"So Obito is at his peak state together with his 2 tomoe sharingans." Explained Haru

"So that means you only rejected his reality or phenomenon whichever you called it and the effect of the previous reality does not affect the outcome, in which to say I still have Obito's sharingan while he also had his own, so you can just produce sharingan with your healing jutsu correct? If you started to pluck his eyes and heal him again"

Haru was speechless when he heard Kakashi's statement but he still replied "Yes, that would be the case" 

"Well you are already strong enough but please refrain from using your healing technique" said Kakashi worriedly

"Hehe don't worry, I'm only using it for my love ones, I use another healing jutsu for others but it depends on the situation" said Haru

"Fine"

"Then I'll seal your sharingan now"

Kakashi just nodded and Haru approaches Kakashi, He raise his hand and chakra characters appeared in front of Haru's hand and then he place it to his left eye, the characters went to his left eye and quickly sealed his sharingan. 

When the sharingan was sealed, Kakashi quickly notices that the huge burden he felt was now gone and his body relaxes and he quickly felt that his strength is quickly coming back to him. 

"Done"

"Thanks"

"Now tell me what happened?" said Haru

Haru already made Kakashi strong so that this situation would not happen but still fate is at it's play.

Kakashi then started narrating what happened to them.