For Boruto, he could develop from being a bit overconfident to a more mature and reliable ninja. Maybe through his interactions with Sumire, he learns to think more before acting. For Sumire, she could become more assertive. Working with Boruto, she might find the courage to voice her opinions more often and take on more leadership roles.
Writers often portray Boruto and Sumire's love in fanfiction as a kind of young, innocent love. They might write about how Boruto makes Sumire blush with his cheeky comments, or how Sumire's presence makes Boruto more focused on his tasks. It's all about the small, cute interactions that show the start of their feelings for each other.
As of now, no. In the Boruto series, their relationship is mainly focused on their friendship and comradeship as ninja. There are some moments that fans might interpret as having a hint of something more, but the story has not made their relationship a romantic one in an official capacity.
In fanfiction, Boruto and Sumire could have a very sweet relationship. They might start as friends, gradually realizing their deeper feelings. For example, they could support each other during difficult ninja missions. Boruto's boldness and Sumire's intelligence would make them a great team, and that could be the foundation for their love to grow.
One common theme is the growth of their relationship against the backdrop of the Hidden Leaf Village. Their love often develops as they train together and face challenges side by side.
In fanfiction, the idea of Boruto and Sarada getting married is quite popular. Many fans like to explore this relationship because they have a unique bond in the Naruto universe. Their personalities, with Boruto being adventurous and Sarada being determined, could make for an interesting married couple in fan - created stories.
Well, perhaps in the fanfic, there could be a plot where Boruto gets injured during a battle and Sumire has to take care of him. While taking care of him, she discovers a side of Boruto that he usually doesn't show. And Boruto, in his vulnerable state, starts to see Sumire in a new light. This could lead to a budding romance between them.
Their relationship could develop through shared experiences. For example, if they both get involved in a dangerous fight against a common enemy, they'll start to trust each other more.
One idea could be that they go on a secret mission together. During the mission, they face various challenges that test their skills and teamwork. This could lead to a deeper understanding and bond between them.