There may be more chapters in the future, but each chapter of moments is complete.
Disclaimer: I don't own Naruto.
1
Tenten's first kiss was not Hyuuga Neji. Her first kiss was in fact Uzumaki Naruto.
It happened when they were ANBU rookies. Tenten and Naruto had been sent on their first mission alone together; it was coincidentally Tenten's first seduction mission.
Tenten knew that the mission was likely to get unpleasant, and asked Naruto to do a favor for her. He was oddly sympathetic; Naruto viewed Tenten as being more like an older sister than anything else, but he figured it wouldn't be too bad, and Tenten told him that she would rather that a boy close to her own age be her first kiss rather than a middle-aged fat man stinking of sake and decay.
It was, to both of them, surprisingly pleasant. Naruto pretended it was Sakura while knowing that Neji would kill him if he could see this, and Tenten mirrored Naruto's thoughts, pretending it was Neji and knowing that Lee would kill him if he saw this.
They had the agreement that they would never speak of it around other people again; they would occasionally laugh about it at Naruto's apartment over takeout while watching movies.
And for the record, no, they did not have sex; the mission called for a virgin.
When Naruto later waggled his eyebrows and jokingly said "Maybe we should have done that too," Tenten tried not to slug him too hard.
2
A year after the close of the First Great Shinobi World War, an albinistic, white-haired, blue-eyed girl named Hayashi Hisano was born in a snow-covered village in the north of the Earth Country.
When she was two years old, Kumo nin attacked her little village. Hisano's first memories were a vivid recollection of the blood of her mother and older sisters hitting the snow as they died, and of a Kumo nin using her for kunai practice, deliberately missing her in order to terrorize the toddler. All of the kunai missed her except for one that grazed her face, leaving a small crescent-shaped scar above Hisano's right eye for the rest of her life.
When Iwa nin came and found the village, they found only one survivor, a half-catatonic toddler nursing a rabid hatred of Kumo nin.
As she grew, though Hisano was only recognized in the Academy as having one hundred percent accuracy and being otherwise average, she was actually the most intelligent student in her year; she didn't test well.
Hisano became a genin at ten, made chunin at twelve, and hit jonin at sixteen. She was a combatant for the entirety of the ten-year-long Second War, and eventually became an ANBU Hunter nin. She made a living terrorizing Kumo nin out of their wits. She cut a swath through the Kumogakure ranks, and was forever after known as the "Reaper" of Iwagakure.
She bore a child to a man from a dispossessed clan, who died before the baby was born. All the child inherited from his father was his facial structure, and the color and shape of his eyes.
Hisano was killed during the Battle of Kikyo Pass, in the first year of the Third War. Her infant son was found by a Leaf medic.
Her son's birth name was Hayashi Yukito.
His legal name was Yakushi Kabuto.
3
Senju Hashirama and Senju Tobirama were not related in any way, shape or form.
When Hashirama, an orphan roaming the countryside of the Land of Fire, was fourteen, he ran into a small albinistic boy named Tobirama who could manipulate water, just as Hashirama could manipulate plant life. Hashirama took the boy under his wing, looking out for him, and young Tobirama soon adopted the name of Senju.
No one ever knew that Hashirama and Tobirama weren't related; it was only a matter of coincidence that their names had identical suffixes and that their facial features bore a small amount of resemblance to each other.
4
Gaara rued the night he discovered how low his tolerance for alcohol was.
Naruto, Kiba and Shikamaru approached him while he was visiting Konoha, talking about introducing him to the joys of sake. Gaara, like a fool, agreed.
When they got to the bar that night, Naruto handed Gaara a shot glass of sake. Gaara drank it.
And promptly passed out.
Gaara woke up several hours later on Naruto's couch with a splitting headache, Kankuro on one side of him, splashing cold water in his face and looking concerned, Tsunade on the other side of him, snickering under her breath.
The entirety of the Rookie Nine and Team Gai was crowded in the apartment, and Temari was trying her very best to throttle Naruto while screaming at him about getting her baby brother drunk.
5
For exactly six months, Naruto was convinced that he was in love with Temari.
It started when Temari was beating him up for the "Gaara-got-drunk" incident. Soon after that, he was following her everywhere.
Naruto became Temari's unofficial shadow. She was a bit bemused by this; Kankuro was amused. Hinata was devastated, and Sakura and Shikamaru were both jealous without really knowing why. Everyone else just gossiped behind their hands.
Gaara, however, had to take exception to this. Exactly six months to the day after he began following her, Gaara took Naruto aside and told him that while he counted Naruto as his closest friend, his status as Temari's baby brother made him obliged to kill him if it went any further.
Naruto began to seriously re-evaluate his feelings towards the blonde kunoichi from the Sand after that.
6
Nearly nine months after an invasion of Konoha by enemy nin, Shizune went into labor with her first and only child.
She had never shown much, and Tsunade hadn't been aware of it, but Ino and Sakura were; they had snuck into her apartment after seeing her talking with the man in question during the battle because they had known that the man had been among those dead.
Ino and Sakura sat on either side of her during the delivery, Ino holding "Shizune-sensei's" hand while Sakura dabbed her forehead with a wet rag. Tsunade delivered the child.
When Shizune was done giving birth, Tsunade asked her who the father was so she could track him down and kill him. Shizune only answered dully that he had been killed during the invasion.
Tsunade accepted this without question; that broad statement included half the ranks. Sakura and Ino exchanged knowing looks; what they knew that Tsunade didn't was that the man had been killed on the wrong side of the battle.
The child was a boy with coal-black hair and hyacinthine blue eyes that faded to an equally dense black within minutes. He lived for only six hours.
At Tsunade's insistence, he was buried on the Senju family burial ground. He was never given a name.
7
If Sasori had never defected from Sunagakure, he and Jiraiya would have eventually become close friends.
They bonded over talks about their jinchūriki godsons as they tried to protect Naruto and Gaara respectively from the ridicule and persecution of their villages.
During one of their very long conversations, Sasori mentioned that he had been losing his sanity day by day since taking Gaara on as his charge. Jiraiya could sympathize.
8
Yuuhi Kurenai, a Sunagakure native and a victim of a Leaf attack on the Sand during the Second War, met Sarutobi Asuma when she was seven, while recovering from being poisoned by nerve gas in a Konohagakure hospital.
Asuma had been visiting an injured relative, and had noticed Kurenai all alone in her room, no visitors or anything, staring numbly out the window.
He went in, introduced himself, and asked her what she was doing in the hospital.
Kurenai told him to go to hell.
Asuma was stunned. It was the first time his boyish, slightly arrogant charm hadn't worked on a girl. Sarutobi Hiruzen, who had been watching the exchange, took Asuma aside and explained Kurenai's circumstances in the hope that his son would leave the poor girl alone.
Asuma did not leave Kurenai alone.
The next time he came, he brought a vase of rosemary with him. Kurenai promptly started bawling. Her mother had kept rosemary in their house.
They became friends the day Asuma brought his brother and a board game with him.
9
When Temari was sixteen, she caught wind of a plot by the council to have Chiyo forcibly extract the Shukaku from Gaara, an action that would have killed him.
Temari took instant action. She threatened all of them separately with scandal, disgrace, financial ruin and ultimately violent death if they ever so much as thought of pursuing that course of action again. To this day, the council struggle not to pee their pants in fear every time Temari comes near them.
Hell hath no fury like a big sister who's had her baby brother threatened. Women who've been scorned be damned.
10
The only reason Shizune stuck with Tsunade for as long as she did was because of two separate incidents when Tsunade took her back to Konoha to attend the genin exams shortly after the Kyuubi's attack.
Jiraiya and the Sandaime both, on separate occasions, took her aside and told her that they needed her to protect Tsunade from herself. Shizune took it seriously.
11
Jiraiya was in the north a week before the Kyuubi's attack on Konoha, and saw the fox on a rampage that he was sure was leading towards Konoha. He was too far away to get there in time, but he happened to know that Tsunade wasn't.
He had a messenger toad take a message to Tsunade and Minato separately, informing them of the Kyuubi's progress south; he begged Tsunade to come to Konoha's aid.
She didn't.
Tsunade arrived a week after the Kyuubi's attack. Jiraiya was there waiting for her. Jiraiya was terrible in his grief, and he needed someone to blame; his eyes lit on Tsunade.
The ensuing confrontation included the only time Jiraiya ever swore at Tsunade (His exact words, among others, were "selfish bitch"). Jiraiya cursed and raged and wept; Tsunade was stone silent.
Finally, Jiraiya asked Tsunade if she really hated Konoha that much.
To his horror, she said nothing, and Jiraiya found himself wondering how he had ever loved this woman.
12
When Itachi learned of Sasuke's battle at the Valley of the End and that he had beaten a jinchūriki almost to the point of death, he was practically giddy that Sasuke's skills had progressed so far, until he learned who his opponent had been and who he'd been to him, and then the tears began to roll in earnest.
Because Itachi had the first inkling that maybe he had created a monster.
13
Anko and Shizune had a strange sort of camaraderie that no one really understood or wanted to.
They started meeting up in bars soon after Tsunade came back to the village; most agree that it was pure accident the first time. They exchanged a few gloomy words, each other's recommendations on drinks, and agreed to meet "this time next week".
At their weekly meetings, they didn't talk much, and they barely ever made eye contact, but they seemed to enjoy each other's company.
The basis of their relationship: they were both trained by a sannin, and said sensei was having an adverse effect on their sanity.
14
In Iwagakure, members of the ANBU Black Op.s who don't belong to clans are branded with a curse mark upon their admission.
The curse mark is not meant to augment any abilities; instead, it is meant to be used to control the members of the ANBU. The head of the ANBU can activate it if a member is disobedient, and the mark causes intense pain and high fever (often termed "The ANBU Illness") when intentionally or unintentionally activated.
It also alters the genetic code of the wearer. These mutations are never apparent in the wearers themselves, but it does become noticeable in the wearer's children.
One out of fifteen children born to an Iwagakure ANBU is born perfectly normal. The other fourteen are born with an unstable genetic code causing wild mutations or defects that invariably guarantee that they won't live to see middle age. Kabuto was one of the lucky one out of fifteen born normal; Deidara was not.
If Sasuke hadn't killed Deidara, his body probably would have broken down to the point of death by the time he was thirty-five.
15
Kakashi was Yugao's first senpai when she joined the ANBU. Sometimes, late at night on lonely vigils, he would tell her tales of Obito.
16
When Uchiha Mikoto was ten, her mother gave birth to another girl. This girl was subjected to a blood test as all Uchiha were to gauge the potential strength of her Sharingan. That was when the girl's "difference" was first noticed.
The infant girl lacked the genes necessary to use or carry the Sharingan. It was not that she lacked the ability to unlock her bloodline; it was that she didn't have it.
The immediate suspicion was that Mikoto's mother, an Uchiha by birth, had cuckolded her husband, who was the current Uchiha clan head. A genetic test soon disproved that allegation, but the little girl was treated as a shameful secret her whole life. She was not allowed to leave the clan grounds, and was not allowed to be a shinobi.
When the girl was fifteen, a bridge builder from the Wave Country came to the Uchiha clan head, and ended up taking the girl back with him to his home.
The girl's name was Uchiha Tsunami. She soon became just plain Tsunami.
17
The Iron Sand kekkei genkai of the Sandaime Kazekage was once not the only bloodline the Land of Wind possessed. Once, it had more bloodlines than any other country, even the Lands of Fire and Water.
The Land of Fire didn't like that, so they systematically slaughtered all of Suna's bloodline clans over the course of a year, during peacetime.
18
The Yamanaka clan's Shintensin no Jutsu and all of its derivatives had a secret history.
Once, centuries ago, the Yamanaka clan was host to spiritual parasites. These parasites very slowly fed off of the Yamanaka clan's spirits in exchange for giving them the ability to slip their own soul into the bodies of others in order to give the parasites multiple sources of food.
Even after the parasites were exorcised from the clans' bodies, they retained their abilities to slip their souls into the bodies of others.
19
When a mission to deliver a message to an empire to the west came up, Tenten sprung to the opportunity, and convinced the whole of the confused Team Gai to come too.
As they went further west, Tenten seemed to be getting more and more giddy, and Team Gai had no idea why. They were also shocked when the nobleman meeting them seemed to know who Tenten was and called her "my dear niece".
Tenten, little no-family-name Tenten, in fact had a far more prestigious background than anyone in Konohagakure. Her grandfather had been a noble landowner in the empire who had been forced to fled during war. His son, Tenten's maternal uncle, eventually returned and reclaimed his father's title. Since her uncle had no children, she was his heiress presumptive.
When Tenten's uncle died, she would receive a letter requesting that she return to take up her uncle's title. Team Gai found themselves dreading the day that letter would come.
20
What is known about Shisui's final days was that he was ordered to spy on his paternal cousin and close friend Itachi by the elders of the Uchiha clan. What isn't known is that councilmen Danzo, Homura and Koharu informed Shisui about Itachi's mission and ordered him not to report back anything about Itachi's behavior to the clan.
Shisui was on Itachi's side, to the end.
13: Anko and Shizune's relationship is modeled off of Vir and Lennier's on Babylon 5.