A/N: you may want to have brain bleach handy when you read a certain portion of this. Just warning you now.
After the team got back to Konoha, there was a timeskip that Kakashi spent training his team. Unfortunately, the training was stuff such as taijutsu practice, and thus not important enough to waste a training montage on. Because of this, people assume it never happened.
After the timeskip, team seven met three Suna genin on the streets of the village. Sasuke was about to ask what they were doing in Konoha, but was interrupted by MadIin.
"They're here for the Chūnin Exams, of course."
Those words sounded like a choir of heavenly angels to Gaara and Kankuro.
"I love you with all my heart!" Said Gaara. "I shall do anything for you if I may win your heart, even if I have to stop randomy killing people for Mother!"
Beside him, Kankuro said pretty much the same thing, only without the killing. Team seven then left so that Madiln could order Kakashi to enter them into the Chūnin Exams.
On the day of the exam, they went to the exam room, Team Seven's kunoichi easily bypassing the room sign illusion and the genjutsu on the stairwell making it feel like the team had walked for longer than they really had. Once they got to the correct floor, they made their way to team Gai.
"Wow" said Neji, looking at the beauty in front of him. "Your long hair the colour of straw, your perfect lips, your heels angling just right… May I ask who your parents are? They must have been people of exceptional greatness to create such a being as you, who is aided at all turns by the whims of fate."
Then Mardein began her speech. "My parents are Naruto and Sasuke. Once when they were twenty, Naruto decided to experiment with Oiroke no jutsu. I was then conceived within Naruto, even as she turned back into a guy. For some reason my growth within the womb was vastly accelerated, and I would have been born nine days after conception, but there was a problem. There was no hole for me to leave in.
"The doctors tried caesarean incision, but Naruto's healing was too fast for it to work, and he couldn't use oiroke to create a hole because it would have killed me. So I just grew and grew.
"At some point, my mass grew so great that I had a noticeable gravitational effect on the tides. Then the moon itself was pulled to me. As I grew within the womb, so did objects get pulled towards me, and get added to my mass. The asteroid belt, the planets, and even the sun got pulled towards me. I think I was around four months when the Dog Star got pulled unto me. At nine months, I devoured the black hole in the centre of the galaxy; then became a Black Hole myself. Therefore the sheer warping of reality broke the space-time continuum and sent me back to the past, in the body of a normal sized baby after which I was found and adopted by farmers."
For a moment, Sasuke wondered if he should stop being so in love with his teammate, as she was his teammate with Error. File cannot be found due to being erased with Brain Bleach. Brain Bleach. For all your anti mental trauma needs. Then he realised that this was FFNet, where blood relationships between people made pairings more desirable, not less.
Something curious had happened to Rock Lee when he met her. He would have been instantly enamoured with the person the straw-haired, cerulean eyed kunoichi had replaced. This was driven so much into overdrive with the person in front of him; however, that he crossed the line twice, and rolled back to become The Only Sane Man.
"What." Said he. "Seriously, none of this makes any sense whatsoever. How can you, Neji, be so enamoured with someone you just met? And you, whatever your name is. Even if I accepted all that M-preg stuff as possible, which it obviously is not, your science doesn't parse.
"Sirius, the Dog Star, is 8.2 light-years away. Even if both you and it travelled at the speed of light directly towards each other, it would have taken 4.1 years minimum and – how do I know all this stuff? Is there some kind of genjutsu here that's making me hallucinate this? Must be. It's the only possibility that makes sense."
And with that, Rock lee formed the Tiger seal, shouting "Kai!" as he did so.
"How did you do that!? I thought you had deformed chakra coils or something!" shouted random genin number 358.
"Seriously? Why does everyone think that I'm disabled? I just suck at nin and genjutsu, that's all. Neji, Tenten, I'm getting out of here before this madness infects me too." With that, he grabbed his teammates by the shoulders and dragged them into the exam room proper.