Sasuke became a sound ninja, and when Naruto chased him, he was penetrated through the shoulder. When Sasuke returned, he looked at the sky and was lost in thought. Kakashi brought Naruto back, but he didn't expect that Naruto's serious injury did not heal as expected because of the presence of the nine tails in his body and its own powerful healing power. The wound did not improve at all, and Kakashi panicked for a long time -
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