Your alive?
Team 7 (Kakashi, Naruto, Sakura, and Sai) had been running through the forest towards an Akatsuki sighting. They were to bring them back dead or alive. When the team got to a clearing near a cliff they were confronted by Deidara and Tobi.
The four quickly got in fighting positions and charged at the Akatsuki. Kakashi went for Tobi while the other three fought Deidara.
Kakashi pulled up his headband before going at Tobi with a kunai in his hand. He threw it in which Tobi dodged and he ran at Kakashi with his own kunai. Kakashi pulled out another kunai before meeting Tobi in the middle and they went into taijutsu.
Tobi shoved Kakashi back in which the copy nin ran at him again with a Chidori. Tobi stood his ground and the Chidori hit him in the gut. When Kakashi pulled back he was shocked.
"Yeah," Tobi knocks on his chest. "I'm kinda hard to hurt," he said and scratched his head sheepishly.
"Then I'll have to go elsewhere!" shouted Kakashi and charges another Chidori before going at Tobi to his head.
He hit but didn't injure Tobi; instead of killing him he cracked his mask.
Deidara and team 7 froze as the mask fell from Tobi's face. Tobi's eye widened and he tried to cover his face but it was too late.
"Obito?" whispered Kakashi.
"Heh," Tobi shifts his eye patch. "The one and only 'Kashi-teme," said Tobi.
"Stop stalling un!" shouts Deidara. "Kill him!" he said before going at the younger team 7.
Tobi growls. "Excuse To- I mean Obito," he said and tackles Deidara.
"What are you-," Deidara's eyes widened as he was taken over by Tsukuyomi.
"Yeah just sleep Sempai," said Obito and Deidara faints. Obito stands and faces Kakashi. "He won't remember today," he concluded and lifted Deidara to his shoulder then began to walk away.
"Wait Obito," called Kakashi and Obito turned. "What happened that day?"
"O-I survived that crash. The rocks somehow didn't end my life so I was stuck down there for three days before Zetsu-sama found me," said Obito. "He and Sasori-sempai made new right side of body."
"You can come back to Konoha, you don't have to do this," said Kakashi.
Obito shook his head. "I owe them a lot. They have helped me too much for me to just leave," said Obito and after a few hand sighs poofed away.
"Kakashi-sensei who was he?" asked Sakura.
Kakashi lowers his headband and smiles. "A hero kids, a hero," he said and they left.