In a fanfiction, Naruto might plan a big public proposal. He could gather all their friends and family in the Hidden Leaf Village. He would make a big speech about how Hinata was the one who saw him when others didn't, and her love changed him. Then, with everyone watching, he would pop the question.
One possible scenario could be Naruto confronting Hinata about her overprotectiveness. He might feel that she's being too clingy and it's affecting his freedom to pursue his ninja duties.
One possibility is that Naruto would plan an elaborate and very public proposal. Since he is a bit of an attention - grabber, he might do it during a big festival in Konoha. He could gather all their friends and family, make a big speech about how Hinata has always been there for him, through his toughest times, and how he realizes she is the one he wants to spend his life with. Then, he would get down on one knee and present her with a ring.
One possible scenario could be that Naruto makes a huge mistake in their relationship. Maybe he's so focused on his duties as Hokage that he neglects Hinata's feelings. He might start taking her for granted, not spending enough time with her or not being there for important moments in her life.
Their married life in fanfiction may also include quiet moments. For example, they might sit on the porch at night, looking at the stars and just enjoying each other's company. Hinata could be the one who keeps the family grounded while Naruto is out there protecting the village.
Hinata would be overjoyed. She has loved Naruto for a long time, so his proposal would be like a dream come true for her. She might start crying tears of happiness and immediately say yes without hesitation.
Well, one scenario could be Naruto coming home after a long day of Hokage duties. Hinata would greet him with a warm smile and a home - cooked meal. Their kids would be excited to see their dad and tell him about their day at the ninja academy.
One scenario could be that Naruto is initially shocked but then quickly realizes his own feelings for Hinata. Another might be that Hinata's confession causes a stir in the village as it's a very public event. Or perhaps Naruto is in the middle of a difficult mission and Hinata's confession gives him new motivation to succeed.
It might occur when Naruto is training hard and gets injured. Hinata comes to his aid, tending to his wounds. As Naruto looks at her with gratitude, he realizes his true feelings for her. Hinata, seeing the look in his eyes, blushes deeply. Then, slowly, they share their first kiss, a tender moment filled with unspoken love.
One possible scenario could be Naruto and Hinata being shocked by the unexpected match - ups in the death battles. Maybe they'd be cheering for their favorite characters or be completely baffled by some of the outcomes.
Iruka sensei might also be involved. He has always been like a father figure to Naruto. He could give Naruto the confidence he needs and maybe even help him plan the location for the proposal, perhaps a place that has sentimental value for both Naruto and Hinata related to Naruto's early days at the academy.