I'm not sure specifically if there are super - popular ones with that exact title. But there are likely many Naruto - based fanfics where Sakura has some sort of strained relationship with Team 7. You'd have to search through fanfic platforms like Archive of Our Own or FanFiction.net to find out.
There might be some, but it's hard to say which ones are really popular. Fanfic popularity can vary a great deal. Some fanfics with this kind of concept could gain popularity if they offer a really interesting take on Sakura's character and the team dynamic. However, without thoroughly searching through the vast amount of Naruto fanfics, it's difficult to point out any particular ones as being 'popular' in this regard.
It could mean that in a fan - created story (fanfic), Sakura is depicted as ignoring Team 7. Maybe she has some sort of conflict or just a personal choice within the context of that particular fan - written narrative.
He might be initially confused. Sasuke is not used to Sakura ignoring him as she has always been somewhat persistent in her attention towards him. So, he may be at a loss as to why she is suddenly acting this way.
Sakura might initially be confused. She would probably wonder why Naruto is acting this way all of a sudden. For example, she might try to get his attention by calling his name a few times, but when he doesn't respond, she could be left feeling a bit bewildered.
In some fanfics, Naruto may ignore Sakura because he has his own emotional traumas to deal with. He might find Sakura's presence a reminder of things he wants to forget or move past, so he chooses to keep his distance. For example, if he has faced a lot of rejection from her in the past, he could decide to just cut her out of his life.
There is a fanfic titled 'Naruto's Solo Journey' where Naruto decides to distance himself from Sakura. He believes that she is too focused on Sasuke and he wants to carve his own path without getting involved in their drama. This makes for an interesting read as it shows Naruto's growth in a different light.
She could be confused at first. She might not understand why Naruto is suddenly ignoring her, since they were friends before. So she might try to approach him to ask what's wrong.
It's possible that there are some niche fanfictions with this plot, but they may be hard to find. You would probably need to search through various Naruto fanfiction websites using specific search terms related to 'Kakashi cheats on Sakura' and then sift through the results to see if any are well - received or have a following.
I'm not sure specifically which ones are extremely popular. But on various fanfiction platforms, there are likely many stories with this theme. You can search on platforms like FanFiction.net or Archive of Our Own to find out.
There may be cases in fan - made videos on platforms like YouTube. Suppose there's a fanfic based on a fantasy novel series. Sakura, who could be an amateur actor or just a passionate fan, might create a short video where she acts out the romantic encounter between two characters as described in the fanfic. However, without more context, it's hard to point to a definite example.
One possible reason could be that Sakura has finally grown tired of Sasuke's aloof and cold behavior towards her. She might have realized that she has been constantly chasing after him while getting little in return, so she decides to ignore him as a form of self - preservation.