While two members of Team Kakashi, Naruto Uzumaki and Sakura Haruno, were waiting for their new captain, since Kakashi Hatake was in a hospital for overusing Kamui, and a new member for their team.
After a few minutes of talking, most likely about Sasuke Uchiha, they finally met their two new members. Their captain, Yamato, is an ANBU Black Ops member while the other, Sai, is a new member due to the request of Danzo.
While they were excited about having a new captain since he was a nice person to be around when they met him, Naruto didn't like Sai due to their earlier encounter, and maybe because he told him that he didn't have any balls.
Yamato was silent as he saw the two of the three people he had to look after, especially that Sai guy that the 5th Hogake, Tsunade, told him to look for. He shook his head, knowing that this will be a pain in the ass.
"Guys, guys! Stop fighting, this is a horrible way to cooperate!" yelled Sakura as she pushed Naruto back from hurting Sai, while the latter had a fake smile on his face.
"I agree with you, Forehead." said Sai as then Yamato felt a powerful force, Naruto stopped fighting and Sakura stopped to a deadly silence.
"Oh no." thought Naruto as even he didn't even dare to mock Sakura's forehead since that is a death wish.
He wasn't the only one to feel the deadly force coming from Sakura, but Shino, Ino, Hinata, Kiba, Neji, Tenten, Rock Lee, Shikamaru, Choji, Tsunade, Kakashi and, even in Orochimaru's hideout, Sasuke Uchiha.
When team InoShikaCho, team Kurenai and team Might Guy were either in team missions with her or just a duo team, they knew that pissing Sakura off was the last thing to do, and insulting her forehead is the quickest way to do so.
Despite being one of the three Legendary Sannin, Tsunade was scared for her life when she saw her student breaking someone's spinal cord in one punch when they made fun of her forehead.
Kakashi, despite being her old Sensei and Team Leader, had numerous nightmares of him accidentally making fun of her forehead, which resulted in his head being crushed like a watermelon on a fifty foot drop.
Sasuke may be the strongest member of former Team 7, but he remembered that day when they went on a mission and couple of shinobis, at least 20 of them, tried to attack them, but made a comment of her forehead, which resulted in the biggest one sided massacre that made his brother's massacre of the Uchiha clan look like him playing tag.
Sai tilted his head in confusion, "Hmm, what's wrong? Do you not like to be called Forehead?" he asked, "Okay, how about Ugly?"
And like a twig, Sakura snapped as she began running towards him while Naruto tried to warn him, "SAI, RUN AWAY AS FAST AS YOU CAN! SHE WILL KILL YOU!"
Sai wasn't scared at all, "What do you mean by tha-" that was the last sentence Sai will make in the next months as he was punched by Sakura so hard, he landed in Tsunade's office.
Safe to say, they had to wait for a new member for Team Kakashi.