A/N: This is my first story. I once read a story here, where a similar "incident" happened but as it was not explained what happened afterwards, I was inspired to write this story.
Disclaimer: I don't own Naruto.
The Pond of Union
The Pond of Union is located in a very old wood. Next to the pond is a carpet of soft grass, where the few travellers who know the way to this mystical place take rest to relax or meditate.
"It is called mystical place, because the pond contains allegedly a very powerful jutsu, sealed in it by shinobi centuries ago. Some people bathed in this pond, in the hope to obtain superpowers, but they just got bitten in the butt by something" explains Kakashi to his students.
Only Sakura is listening, because Naruto and Sasuke are fighting.
"Whom did that happen to?" asks Sakura.
SPLASH!
"It's happening now to your teammates. Why do they fight always and everywhere?"
But when Sakura and Kakashi look into the pond, they see only one person reappear. It is a boy whose hair is neither blond nor dark-blue but green and while he has stripes on the cheeks like Naruto he looks more like Sasuke around the nose. He also has the sharingan, but his eyes turn blue, when he deactivates it. Besides that he is dripping wet and wearing far too many clothes.
"Help me, Sensei! Something has happened to me and… other me and now… there's only one me!" calls the merged character.
…
"This is my entire fault", he concludes. (Because each half of him is blaming the other one)
One week later
"…and they really tried everything, but it is impossible to separate me", stats the newly named Sasuto frustrated.
"No! You can't be stuck like this forever!" screams Sakura.
"Thank you for the mental support. It is not easy to accept anyway that instead of hating my teammate I hate myself and don't know how to stop it!"
They are once again at the training ground and waiting for their sensei. Surprisingly, someone else approaches them.
Ryohei has been in the same class as them in the academy and while he is a very talented ninja, his team has failed the genin exam. In Ryohei's opinion, this is because the clan children are privileged and he returned to the academy, because he wanted to prove himself. And the hokage gave him indeed the free place in team seven, if only because there have to be three genin in a team.
And while Ryohei is waving and shouting, that he is joining their team, Sakura and Sasuto turn to each other, both in a whisper asking: "What was his name again?"
A/N: There will be a continuation.