One great example could be a fanfic where Sakura gets jealous when a new female character shows interest in Sasuke. The writer might explore Sakura's insecurities and how she deals with her jealousy. Maybe she tries to prove herself more worthy of Sasuke's attention. Another example could be Sasuke getting jealous when he sees Sakura being too friendly with another male ninja. This could lead to some interesting confrontations and revelations about his true feelings for Sakura.
One good example could be a story where Sasuke is getting a lot of attention from a new female character in the village. Sakura becomes jealous seeing them interact so often. In the fanfiction, Sakura might start to distance herself from Sasuke, which makes Sasuke wonder what's wrong. Eventually, he realizes it's because of his interactions with the other girl and has to work to regain Sakura's trust.
First, you need to establish the relationship between Sasuke and Sakura. Are they already in a relationship or still in the pining stage? If they're in a relationship, you can create a situation where an outsider threatens their bond. For example, a new ninja arrives in the village who has a similar personality to Sasuke and shows interest in Sakura. Then, describe Sakura's reaction. Will she be flattered or immediately reject the new person? For Sasuke, show how he notices Sakura's reaction and how it makes him feel jealous. You can also include internal monologues for both characters to really delve into their emotions.
One good example could be a fanfic where Naruto accidentally spends more time with Ino during a mission, and Sakura gets jealous. In the story, Sakura might start to question her own feelings for Naruto. Another example could be a fanfic where Ino flirts with Naruto to make Sai jealous, but it backfires and makes Sakura jealous instead. There are also fanfics where Naruto has to choose between Ino and Sakura, and the jealousy of the unchosen one drives the plot.
One example is when Sasuke gives Sakura a special item in a fanfic. It could be a charm that has some significance to him, which shows he is thinking about her. Another example is that he might train with her more closely than others. This is not only to improve her skills but also because he wants to be near her.
Good writing style also matters. The language should be engaging and flow well. It should be able to describe the relationship between Sakura and Sasuke vividly. Whether it's their first awkward encounter or a passionate moment, the writing should make the readers feel like they are right there with the characters. Additionally, it should have a proper pacing, not too rushed or too slow in developing their relationship.
One great example is 'A New Beginning'. In this fanfic, it shows Sasuke and Sakura reuniting after a long time apart. Their love is depicted in a very tender way, with Sasuke finally realizing how much Sakura means to him. Another is 'Love in the Hidden Leaf'. It focuses on their daily lives together in the village, full of small, sweet moments that make you believe in their love.
Sakura might directly confront her boyfriend. She could tell him that he has no reason to be jealous of Sasuke. For example, she could say that her feelings for her boyfriend are completely different from any admiration she has for Sasuke.
Well, Sasuke being jealous in this arranged marriage fanfic could lead to some intense moments. He could start training more vigorously to prove his worth to Sakura. Since he has a prideful nature, he wouldn't easily admit his jealousy. But his actions would speak louder. He might get into arguments with the elders who arranged the marriage if he feels they are not considering Sakura's feelings or his own connection with her.
One reason could be that Sasuke is very popular and has a lot of fangirls. In the fanfic, Sakura's boyfriend might feel insecure because Sasuke has this charm that attracts everyone. Maybe Sasuke is always achieving great things and getting a lot of attention, which makes the boyfriend jealous as he might feel he can't compete with Sasuke in terms of popularity and achievements.
A great fanfiction idea is that Sasuke is jealous when Sakura is chosen to go on a mission with a group of other ninjas, and he's not included. He secretly follows them and ends up saving the group from a dangerous situation. Sakura realizes that Sasuke's jealousy was actually his way of showing he cares about her, and this event brings them closer together.