Physical upgrades and Otsutsuki Kaguya

" Thanks Mizuki sensei! I will definitely pass the exam this time! Believe it! "

Naruto pumped his fist as he made his declaration to Mizuki, though this time around he actually could do what he declared.

Smiling Mizuki nodded to Naruto as he went his way and Naruto ran his own way.

' Tree climbing, water walking, in canon Naruto had achieved that high level of chakra control in a day, here because he didn't have Sasuke to compete with, he managed to achieve it in three, but he did nonetheless, his clone justu, transformation justu and substitution jutsu are all at the level of passing , after all nine tails might be destroying his chakra control, that had never stopped Naruto from improving it anyway, he is someone who will master the pinnacle of shape transformation, the rasengan in the future.

After his current practice, now he finally has a higher level of control than required for academy jutsu, Naruto can do them even with nine tails messing around, his better control and nine tails mess, both cancel each other out. At least for jutsu this easy. '

Mizuki had taught Naruto for this entire month, while he himself was completely drowning himself in sage mode.

As Mizuki was walking home, he was turning heads by the double, gawking people was now but a common sight for him, now that he had managed to get himself familiarised with his sage mode, his body has changed in numerous ways, too many to count one by one, he had gone major changes such as a his body itself, defying age, growing into a more defined athelete like form, neither was he too stocky sacrificing on speed, nor was he too skinny, sacrificing on power, his body has always been one of a balanced middle type always, sage mode simply upgraded it to something more, it pushed Mizuki's body where it go go further, wherever it could see potential for... an upgrade.

Mizuki himself would compare his body to one that of a gymnast back home, and if another fictional world was to be chosen as comparison, he would say his body now resembled that of a Saiyan, the main character Goku himself.

' Sage mode that fits the user truly has tremendous benifits, the toads have their sage mode practically make them grow to gigantic sizes, with such increase in intellectual capabilities that it's absurd, for a toad. '

Slightly feeling his strength filled body with every step, Miuzki thought about his own changes.

' My body has not only changed from the outside, even the inside has seen massive changes, my heart has a steady pumping strength, neither too much nor too little, my blood vessels have slightly thickened, even my hair follicles have started align themselves in a perfect shape, not even a stray hair could be now found which isn't aligned properly, it's all quite absurd '

Mizuki found his situation quite amusing, but he had long since figured out why he was going through such changes. Half a month ago he had managed to conclude with numerous observations.

' It's the my sage mode, sage mode itself is beneficial to the body, it changes it, on top of that mine being due to electricity has managed to make the process go on with an atomic level of precision, electricity is supposed to take the shortest path with least resistance after all, after my body was done unleashing it's potential, which was quite soon, almost immediately infact, it started looking for alternatives, to accommodate my increasing chakra my body was obviously not built to have, it started to upgrade me, so to speak, it's possible options were not many, so it simply decided naturally that the best option would be to increase my cell count, which ignoring the harmful alternatives, translated into increasing my muscles, my height and perfecting the synchronisation between everything. '

Feeling high Jonin level chakra now in his possession, even in base form, Mizuki kept his smile as he went towards the Hokage office, the first time since coming to this world.

As the Hokage office was beginning to get near, he kept reminiscing about his further changes.

' After that was done, my cells naturally increased slightly, but that was nearly not enough to accommodate the increasing sage chakra, to solve that, now it went with the alternative, a core level upgrade, one at the genetic level, it has started perfecting my genes...

In fact every sage mode does this, otherwise there would be no turning into toads for toad sage humans, and massive upgrades in body and intellect for the actual toads, but my sage mode in particular is directly working with atomic precision from the beginning, this step that was supposed to come later on, has started from the very beginning. '

Almost reaching the Hokage office, Mizuki concluded his thoughts.

' This should continue, until my potential as a human is completely unleashed, which is extremely high, after all, even Senju, Uchiha and Hyuga, may have alien heritage mixed in, but they are still human, they can fully interbreed with any other human. Their supposed progenitors, the Otsutsuki, on the other hand require unstable genetic reconstruction to even take over someone's body, that too with the assistance of seals, they have drastically different genetic traits. They are after all a whole another species, genetic mixing with interbreeding isn't possible like that, at least not normally.

This makes it all the more hilarious that filler arcs had showed Kaguya with a human husband, hah, she was supposed to have recieved both her offsprings from ' The world ' itself. Canonically that is her true backstory, we might not know exactly how that worked, but it's not difficult to put two and two together '

As Mizuki reached the Hokage office, he started talking to the slightly fidgeting appointment operative, explaining his purpose of visit, he might have had a smile on his face but his mind was still continuing with his thoughts.

' If I am to understand correctly, both of the children of Kaguya were born from chakra aggregate given form, just like black zetsu, their third brother. We might not exactly know how they both came to be but we do know how black zetsu did, Something similar must have happened, we are after all left with only some speculation to go with regarding an alien species, they might simply have a defense mechanism built in to expel undigested chakra they eat, they are a race built around being parasite like, them involuntary splitting up to manage excess food intake is not out of the realm of possibility. After all, both ' children ' have massive problems, one only inherited the byakugan and Otsutsuki body, and one only inherited the Sharingan and sage body of the divine tree? Not one shared at least some genetic similarity with the other? Even the most distant cousin do so, but the two brothers from the very same mother do not even have a shread of shared DNA is just wrong, and how do we know they never had any? Well if they did, not only will the sage have some form of byakugan, his brother should also have some form of Sharingan, even a sage body thrown here and there doesn't hurt but nothing happened, further down the line, throughout the generations, some Uchiha would have awakened the byakugan, some Hyuga the Sharingan or some Uzumaki the rinnegan, nothing like that has happened, not even once, from the very beginning they were like seperate genetic pools, with no interlinked parts, even the very first generation of Ashura and Indira were the same, much less further down the line. '

Mizuki concluded his thoughts as a call had arrived, he would be meeting the Hokage now. It was about time they meet face to face.