Here some more of the story (Wait, I haven't even said the name of the story! XD!)
URAN AND RIN, THE NINJA (that's the name) on to the story:
The needles were going right back at Masaru. He brought out his own fan, one big one, and waved the needles away.
Rin landed on her feet. She stood up slowly, a tired look in her eyes. She started to breath hard as she put her little fans away.
“Ah, a weakness!” Masaru said quietly to himself, “She trains so hard, that she doesn’t have any Chakra, or energy left to battle!”
Masaru grinned devilishly, getting ready to battle, never looking away from his prey.
Chapter four, Thousand Dark Shadows
“Sensei, I have to use so many powers that you forbid!” Rin said whispered softly to herself, “But I think I must!”
Rin started to do various hand signs, speedily, with one hand, while with the other hand, she took out eight black scroll.
“Thousand Dark Shadows, I call upon you!” she yelled, “Help me with this battle!”
“What is she doing?!” Uran whispered to herself in horror.
“She is calling out the shadows from within her…” said a quiet voice behind Uran.
Uran whirled around to see a guy.
The guy had a black mask over his mouth and nose, and black, shiny, wild, spiky hair, and a tired look in his eyes. He had a brown band around his head, keeping his hair from his eyes. He wore a black ninja suit with a green vest over it, black gladiator sandals, dark brown gloves with the fingertips cut off. He had red eyes, and Uran could see Sharigan in them. He also had a little book in his hands.
“Sorry I scared you.” he went on, reading the book, “I am Rin’s sensei, Kengi Sensei.”
“Aren‘t you going to stop her?!” Uran asked.
“No…” Kenji replied, looking up from his book, “If there is one thing I learned about Rin, its that you should never stop her when she wants to protect someone…”
Rin jumped into the air, letting the scrolls unwind in the wind. The scrolls started to wrap around Rin as she flew higher into the air.
Suddenly, a bunch of shadows burst out of Rin, taking the scrolls, and then going back into her. Rin started to fall towards the ground, at high speed.
“Ah, Thousand Dark Shadows? I have only seen one other person use that…” Masaru mumbled to himself.
Rin hit the ground, making a big explosion.
Uran gasped, tears coming to her eyes.
“Thousand Dark Shadows, a power that calls in shadows from the underworld. They go within you, giving you incredible power, but then, they never come out, they live in you. In return for living within you, they come out whenever you call upon them.” Kengi explained to Uran softly, reading his book calmly, “When you first call upon the shadows, they come out of the scrolls, and into you. They cast a spell on you, that makes you stronger.”
“Oh, but they came out of Rin!” Uran mumbled, puzzled.
“Yes, that means that she has already used the summon once.” Kengi said, “So they already live in her.”
“What do they do with the scroll? Why did they take it into Rin?” Uran asked impatiently.
“They use the scroll to make dark chakra and shadow energy for their master.” Kengi replied, “It is a forbidden power, because it can be dangerous, especially to kids, like Rin. (actually, no other kid even know's how to use Thousand Dark Shadows...)”
Suddenly, Rin stood up from all the rubble, as if she were a zombie. Her head was facing down, and Uran couldn’t see her face. She was glowing black with dark chakra.
“Two can play that game!” Masaru growled, “Thousand Dark Demons!”
Kengi Sensei gasped, “Thousand Dark Demons?! Rin’s shadows don’t stand a chance against him!”
Uran started to cry.
Masaru started doing the same things that Rin did, except, he took out ten scrolls.
Soon, he also crashed down into the ground, except when the explosion happened, snake looking smoke went into the air.
Masaru stood up, and looked at Rin. His eyes looked like snake eyes, blood red.
Rin looked up also, and her eyes were red too. The Byakugan, Sharigan, Shinigan, and Yugan were gone.
Masaru and Rin looked like zombies, swaying unsteadily.
Masaru and Rin ran towards each other, even faster then before.
Rin took out ten little fans and jumped in the air.
Masaru took out a big machete, and also jumped into the air.
Rin’s fans grew, into big, sharp fans.
Masaru and Rin passed each other in the air, cutting each other in the face.
They both landed on their feet, kneeling down.
“I see you are stronger now!” Masaru whispered, getting to his feet slowly, his back at Rin.
“I am not that young weakling you found years ago…” Rin replied in a whisper, also getting to her feet, her back at him.
“Join me, and I will make you stronger!” Masaru said, turning around, his eyes big with greed, his tongue long like a snakes.
“Never!” Rin cried, turning around running fast as lightning at Masaru, her fans getting bigger as her will to protect Uran got stronger, “I will never forgive you for what you did to my friend!” she jumped into the air, and sliced Masaru with the fans. But, he turned into smoke.
“A shadow clone!” Rin cried.
Suddenly, from above, the real Masaru jumped on Rin’s back , “Here is a good-bye gift from you!” He bit Rin in the neck (like a vampire.

). Rin cried out in pain.
Masaru jumped off Rin and disappeared in a cloud of smoke.
Rin fell to the ground. Her eyes turned back to normal, and the black glow disappeared. She grabbed her neck and mumbled in pain.
Kengi Sensei and Uran ran to Rin’s aid.
“Rin!” Kengi whispered to the girl.
“Oh, hello Sensei…” Rin’s face turned red, “I-I’m sorry!” She started to breathe hard, holding her neck.
“Let me see.” Kengi ordered, taking Rin’s hand off her neck.
Rin had a curse mark on her neck. It looked like a small circle with two snakes in it.
“I will have to seal this…” Kengi Sensei mumbled to himself.
"Rin, why do you use such strong powers? Why don't you use smaller powers?" Uran asked her friend.
"I use these powers because no other jutsu or powers will work on Masaru!" cried Rin in pain.
Hope chu all like it!