Another way is through a school club. Let's say they both join the photography club. They go on photo - hunting trips around the school and the town. Itachi's unique perspective in photography fascinates Sakura, and Sakura's enthusiasm for the art makes Itachi open up more. They share their photos with each other, and with each shared moment, their relationship grows deeper.
They could start as study partners. Itachi helps Sakura with more difficult subjects like math or history. Through these study sessions, they get to know each other's personalities better. Sakura might notice how gentle Itachi is despite his cold exterior. This could lead to them having lunch together regularly, and then eventually going on outings outside of school, like to the park or the library.
They could start as rivals in academics or sports. For example, if there's a science competition in the highschool, both Itachi and Sakura are determined to win. However, as they prepare, they start to respect each other's intelligence and hard work. This mutual respect could be the first step in developing a relationship.
Imagine if they were seatmates in a difficult class. Naruto struggles with the subject, and Sakura decides to tutor him. As they spend time together studying, they start sharing their dreams and fears. This would gradually develop their relationship from just classmates to good friends. And who knows, maybe more as they get to know each other on a deeper level.
The possessive relationship could start with Itachi saving Sakura from a dangerous situation. After that, he feels a sense of ownership over her safety. For example, he starts to follow her around discreetly. Sakura might notice this and be a bit annoyed at first but also a little flattered.
Their relationship could be developed through a series of flashbacks. For instance, Itachi could recall moments from Naruto's childhood that he observed while in the ANBU. These memories could make him see Naruto in a new light. Meanwhile, Naruto could learn about Itachi's past and the sacrifices he made. This exchange of knowledge could build a bond between them based on empathy and respect. In addition, they could train together in secret, with Itachi teaching Naruto some of his ANBU skills, which would also strengthen their relationship.
They could develop a mentor - mentee relationship. Itachi uses his knowledge of the Sharingan to teach Naruto new combat techniques. As they train together, they bond over their shared experiences of loss and their desire to protect the people they care about. Naruto might also help Itachi come to terms with his past actions and find some peace within himself.
They could be paired up for a diplomatic mission to another ninja village. Along the way, they encounter various cultural differences and political intrigues. As they navigate through these situations together, they grow to respect and care for each other more.
It can be shown through Itachi's actions. For example, he might not allow other characters to get too close to Sakura. He could give warning looks or subtly use his power to keep others at bay.
Well, it could start with a simple moment of curiosity. Naruto, being the friendly and outgoing kid, might be attracted to baby Itachi's calm and somewhat mysterious presence. They could start by sharing simple things like toys or food. As time goes on, Naruto's determination and positive attitude could inspire Itachi, and Itachi's intelligence and calmness could influence Naruto in return.
In fanfiction, their possessive relationship can be developed through external threats. Let's say there's a new enemy who is specifically targeting Sakura because of her relationship with Gaara. Gaara becomes extremely possessive and protective, not allowing her out of his sight. Sakura, seeing his worry, also becomes possessive of their time together and doesn't want to be separated from him even for a moment. As they face this threat together, their possessive feelings grow stronger and their relationship deepens.
The relationship can also be developed through their interactions with other characters. For instance, if they have a child, how they both interact with the child and how their parenting styles differ and blend. Also, how they interact with their friends like Naruto and Hinata. Maybe they have double dates or group outings. All these interactions can show different aspects of their relationship and how it grows and evolves over time.