Because Yinsen had acted too quickly, Naruto had not been injured by the Demon Brothers' poisoned claws, so he did not need to bleed out the poison—but he still could not escape Sasuke's mockery.
It was precisely that mockery that spurred Naruto to work even harder. If Sasuke had not spoken up, Yinsen had even considered taunting him himself to steer the "plot" back onto the "right track."
Fortunately, Sasuke had not disappointed him after all.
At the same time, after speaking with Tazuna, Kakashi Hatake decided to continue carrying out the mission.
From Kakashi's decision, one could infer that Konoha had probably known about the Land of Waves' situation long ago. Otherwise, there would have been no need to specifically send Kakashi out.
It was precisely because they had considered the difficulty, danger, and necessity of this mission that they had brought Naruto and Sasuke along, allowing the two of them to undergo real training and grow faster.
Otherwise, Kakashi's decision simply made no sense.
No matter what, Team 7 and Yinsen continued toward the Land of Waves. Since Yinsen had cleanly and efficiently killed the Demon Brothers, Kakashi could not interrogate them and could only judge the situation from the equipment they carried.
The information they obtained was limited, but that did not matter. For now, it was enough to confirm that this mission would not be so peaceful.
Naruto was brimming with motivation again, while Sasuke remained silent.
Sakura Haruno was a little worried, but when she thought of how Kakashi seemed like a reliable Instructor, and how both Yinsen and Sasuke were very strong, it did not seem like there would be much danger.
Besides, the following days really were peaceful. Every day was spent traveling, and no more enemies appeared.
Gradually, Sakura Haruno stopped worrying.