Another plot could involve Sakura being forced to betray Naruto. Let's say an enemy captures someone she loves dearly, like her parents or Sasuke, and forces her to give information about Naruto in exchange for their safety. This would create a very complex and tragic situation for her.
At first, Naruto would likely be extremely shocked. He has always considered Sakura a friend and teammate, so this would be a huge blow. He might question his own judgment in trusting her.
Well, it could be that Rias betrays Naruto for power. Maybe she makes a deal with a powerful enemy of Naruto in order to gain more influence in the ninja world or some other realm. Another possibility is that she betrays him out of jealousy if Naruto has something she desires deeply, like a special technique or a strong bond with someone she wants to break.
One possible plot is that Naruto and Sakura get sent on a long - term mission together, away from the village. During this time, they rely on each other completely and this deepens their bond. They start to share their dreams and fears, and that's when their love begins to bloom.
One plot could be that Naruto and Sakura are seeking shelter in the cave from a powerful enemy. Inside, they find a hidden scroll that contains a powerful jutsu that was lost long ago. They then have to decide whether to keep it safe or use it to defeat their enemy.
Well, in this kind of fanfiction, it might be that Sakura loses Naruto because of a misunderstanding. Maybe some false rumors spread about her, and Naruto distances himself from her. Then Sakura has to find a way to clear her name and win back Naruto's trust. Or perhaps Naruto is influenced by some dark force that makes him turn away from Sakura, and she has to fight against this force to get him back.
Well, in a 'mikan sakura betrayed fanfic', she could be betrayed by her family. Say her sister steals an important opportunity from her, like a chance to study abroad or participate in a big competition. It would be a huge betrayal as family is supposed to support each other. Also, in a magical or fantasy version, Mikan could be betrayed by her mentor in the art of magic. The mentor might use Mikan's trust to steal a powerful magical artifact that Mikan was supposed to protect.
One possible reason could be that Naruto has his own goals and missions that he is so focused on that he tries to avoid distractions, and Sakura might be seen as a distraction in some sense. For example, he is always aiming to become Hokage and improve his ninja skills, and any personal relationship drama could get in the way of that.
Well, one possible plot could be that they have a late - night conversation that turns into a deep sharing of their dreams and fears while Sakura is sleeping over at Naruto's place in a very innocent and friendly way. Maybe they end up making a pact to support each other more in their ninja missions.
One possible plot could be that Sakura is in an alternate universe where she has lost her memory and kisses someone else thinking they are her true love. Another could be that she is under a spell which makes her kiss someone else, and then she has to deal with the consequences of that action.
One possible plot could be Sasuke getting involved with another character due to a misunderstanding or a sense of being drawn to someone who seems to understand a different side of him that he feels Sakura doesn't. For example, if there's a new female character who shares his dark past experiences more directly.