Naruto, Pervy Sage and Namiko arrive at the Hokage Tower at the same time as Granny Tsunade.
"Hello Naruto," says Granny Tsunade, ruffling Naruto's hair. "How are you doing?"
Naruto grins widely. "I'm great, 'tebayo! Kimiko fixed the picture for me. She's awesome."
"Huh," says Tsunade. "Looks like Jiraiya produced something worthwhile."
"Hey!" says Jiraiya, pretending to be annoyed by Granny Tsunade's jibe.
Naruto and Namiko giggle. It's always funny when Granny Tsunade and Pervy Sage subtly mock each other.
The four of them walk up to the Cypher Room together. Mr. Nice Hokage, Wind, Rain and Sasuke are already there waiting. "Hey, how come Sasuke is here?" asks Naruto, glaring at Sasuke.
Sasuke sticks her tongue out at Naruto and says, "I'm here to read the scroll, dumbass."
"So your hair is also still green," sighs Mr. Nice Hokage, referring to the fact that Naruto and Sasuke still have green hair. All of Team Seven kept their hair green in hopes that eventually someone will give them a good reaction. "I am not happy about Sasuke's hair changing colour twice in a year. Let me know you when you plan on stopping. Now, let's get on with the scroll reading."
Naruto and Sasuke exchange a disappointed glance. Still no worthwhile reaction.
"Take a seat, everyone," says Mr. Nice Hokage. "The history lesson on the Sacred Scroll of Dave is quite long."
Wind, Rain, Naruto, Granny Tsunade and Pervy Sage all sit down. Namiko stands awkwardly by the door.
"Come over here, Namiko," says Naruto, waving her over. "We brought Namiko-chan because Iruka-nii has his teacher on, 'tebayo." Namiko runs over to Naruto and climbs onto his lap.
"Alright, Sasuke, read away," says Mr. Nice Hokage, sitting down at the table beside Sasuke.
Sasuke takes a deep breath and opens the Sacred Scroll of Dave, which is sitting on the table in front of her. Then she activates her sharingan and starts to read, a bit shakily. Naruto is surprised to discover that the Scroll is half history-lesson and half an explanation about love and sharingans.
According to the scroll, Uchiha clan and the Umino clan are sister clans in the same way that the Uzumaki and Senju clans are. Indra's eldest child, his only son, had two daughters. One sister married a man named Uchiha, and the other married a man named Umino. From those two sisters and their husbands two sister clans were born: the Uchiha and Umino. For some reason, out of all Indra's children, only the eldest passed the sharingan on to his children, even though he himself did not have it. And even stranger still, out of all Indra's grandchildren, only Uchiha's children inherited it. No one, either when the scroll was written, or back when Indra's grandchildren were alive, understood why the sharingan selectively skipped a generation. The Umino Clan, while descended from the Sage of Six Paths' elder son, never awakened the Sharingan, or seemed to have the potential to.
On the other side of the Sage of Six Paths' family line, Ashura's eldest child also had two daughters. One married a man named Senju, and the other married a man named Uzumaki. Together, they founded the Uzumaki Clan and the Senju Clan. Unlike the other three clans, the Uzumaki Clan began and remained a matriarchal Clan. The only times that a man led the Uzumaki Clan were the times when the rightful Queen was too young to lead and her father or grandfather took over for a while. During the Founding of the Leaf, Ashina Uzumaki led the Hidden Whirlpool after his wife, son-in-law and daughter died, leaving Ashina's one year old granddaughter the Queen of the Hidden Whirlpool. In regards to Kekkei Genkai, the Senju clan inherited the wood style jutsu, while the Uzumaki Clan inherited the longevity and powerful chakra of the Otsutsuki. The Uzumaki Clan also inherited an odd trait from the Sage of SIx Paths himself: an affiliation for ninshu. The affiliation to ninshu did not make them able to actually use it, however, their fuuinjutsu incorporated both ninshu and ninjutsu, making it more powerful than any other fuuinjutsu. For that reason, many Uzumakis have problems learning ninjutsu techniques because they work better when drawing on both ninjutsu and ninshu.
The Umino Clan also possess this trait, although they generally have no difficulty learning anything that can be learned. (That fact does not surprise Naruto much.) For centuries, these four clans inhabited the same space of land: the Lands now known as the Land of Eddies and the Land of Fire. The Senju and Uchiha often went to war against each other, as did the Uzumaki and Umino. However, the Umino and Senju Clans left each other alone, as did they Uzumaki and Uchiha. Roughly 200 years before the Uchiha and Senju Clans forged an alliance, the Umino and Uzumaki Clans made permanent peace through marriage. (Naruto knows about that story. Iruka-nii told them at the Temple of Jashin.)
After the history lesson, the scroll turns back to the Uchiha Clan. It explains how an Uchiha feels love more deeply and passionately than anyone else. In fact, they feel love so deeply they seal it away deep inside them out of fear. And then, when that love is released, it brings a whole lot of other suppressed emotions out with it. When an Uchiha knows love and loses it, a special condition emerges. The loss of great love, or disappointment in themself causes a change in an Uchiha's brain. Their charaka reacts with the optic nerve, causing a change in the eyes. That change is known as the sharingan: the eye that reflects the heart. The sharingan taps into the Uchiha's love, increasing both their power and their hate. The most sensitive Uchiha are the ones most likely to fall prey to this condition and then go insane as Madara Uchiha did. The deeper the Uchiha's emotional trauma, the more powerful they get.
After that discussion about the sharingan, plus a few specific examples of such cases, the Scroll turns to Indra and Ashura themselves. Naruto, who is dangerously close to boredom by the time the final topic of the scroll rolls around, is busy brading Namiko's hair to keep himself entertained. Because he is distracted, Naruto only registers that the Senju and Uchiha clans hated each other because Indra and Ashura reincarnated into members of the two clans. Indra and Ashura apparently hated each other or something, Naruto doesn't care. Madara and Hashirama were the last known reincarnations, and whoever the current ones are is unknown. However, those exact two people are needed for the jutsu that will seal away Black Zetsu.
"And now it just has a seal formula," finishes Sasuke, finally ending the history lesson.
Namiko yawns a big wide yawn and says, "That was boring. Was it written by a Senju?"
Mr. Nice Hokage laughs. "Yes, but he was dictating to an Uchiha."
"An Uchiha on a sugar high," mumbles Sasuke.
"An Uchiha on a sugar high is still not as stupid as two clans fighting for hundreds of years because two brothers couldn't get along," says Wind saltily.
"It's probably because of the Cycle of Hatred thing that Nagato sensei is always going on about," says Namiko, yawning.
Naruto ties a hair tie onto the 30th and last tiny braid in Namiko's hair. "There!" Naruto says. "I've finished your hair!"
"Why do you have hair ties sealed into a seal on your wrist?" asks Rain, sounding surprised and confused.
Deciding to tease Rain a bit, Naruto just says, "Hinata."
"Eh?" Rain sounds even more confused. "Well...where did you learn to braid hair?"
"Hinata."
"But...that doesn't tell me anything."
"Hinata."
"But…"
"Hush, Rain," says Wind, patting Rain on the head. "Naruto's best friend is a girl named Hinata. He probably carries spare hair ties for her, like you do for me."
"Ooooooh!" Rain sounds truly enlightened. Naruto wishes he could see Rain's face right now. "That makes sense."
"If I leave my hair in the braids it will be all wavy for tomorrow!" says Namiko, grinning excitedly.
"What's happening tomorrow?" asks Mr. Nice Hokage.
"Burifu and I are going to be fairies at a wedding!" grins Namiko. "We're even getting paid!"
"Hinata has expanded her business," says Naruto. "Now that she has two unicorns, people are asking for two fairies as well." Of course, half of the customers asking for fairies want their own children, nieces or nephews to be fairies. "Hinata is even expanding to costume hire now because she's having to make costumes for the fairies people want. She's got so many costumes now that she had to get her Dad to build a costuming room and make a deal with a costume designer."
"Sounds to me like Hinata has good little business there," comments Granny Tsunade.
"She's filthy rich," says Naruto.
"Can we get back to the scroll now?" says Mr. Nice Hokage. "Does anyone have any questions about the contents?"
"I have one," says Pervy Sage. "Why didn't the scroll mention the Uzumaki Clan's kekkei genkai? You know: the chakra chains and the bite-healing?"
"They didn't come from the Sage of Six Paths," says Naruto, who learned about this from Iruka-nii. "They came from Uzumaki himself - well, his mother. Even way back then, the kekkei genkai were girls-only."
"Ah, I see," says Pervy Sage. "Now, how are we going to find Indra and Ashura's reincarnations? The Senju Clan dissolved itself into the Hidden Leaf. It has spread through the village so thoroughly, there are only a few people that actually carry the name 'Senju'. And of the ones that could carry the name, only Tsunade actually uses it. Most just don't give a clan name, like that Tenten girl."
"I suppose we should just test every man and boy in the village that has Senju parents or grandparents," sighs Mr. Nice Hokage. "And every boy and man in the Uchiha Clan too."
"How are you going to test them, though?" asks Naruto. He wasn't paying attention to that part.
"Using the test in the Scroll of Joe," explains Rain. "We knew two people were required because of the test, but we can't access it without the formula right here." She points to a sealing formula on Dave's Scroll. "We did not think it would be reincarnations. Finding people to fit the requirements is a whole lot harder than we thought it would be."