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.
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.
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.
Often, they could be on a team in a tournament setting. Facing off against other teams to prove their skills and win a prestigious prize. Or it could be a rescue mission to save someone important.
One more scenario could be a time - travel fanfiction. Naruto and Hinata are sent back in time to when they were kids. Naruto gets to see Hinata's childhood self more closely and protect her from the bullies. This experience makes their bond even stronger when they return to their own time.
A typical scenario could be that Hinata is initially shy when she realizes she's in the bath with Naruto. She might try to cover herself up. Naruto, being his oblivious self at first, doesn't really understand why she's so flustered. But then as the story progresses, he starts to notice Hinata's beauty and the unique way she is. Another scenario could be that they are in a hot spring bath which is a common setting in Naruto - like settings. They might be surrounded by beautiful natural scenery while in the bath, which adds to the romantic or friendly mood of the story.
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.
A really romantic scenario could be where Naruto has a near - death experience. Hinata is by his side the whole time he's recovering. When he finally wakes up and sees her tear - stained face, he's overcome with emotion and kisses her gently. It's a kiss full of gratitude and new - found love. It shows how Hinata's loyalty and love for Naruto is unwavering, and Naruto finally sees her in a new light.
A really sweet moment could be during a family picnic. They find a nice spot near a stream. The child is running around, chasing butterflies. Naruto joins in the fun, while Hinata sets out the food. Later, as the sun starts to set, they all sit together, the child in between them, and Naruto tells stories of his adventures, with Hinata adding in her own memories, creating a warm family bond.
A common scenario is Naruto and Hinata training together. Hinata can show Naruto some of the more refined aspects of her clan's jutsu, and Naruto can teach her some of his unorthodox but effective combat styles. This helps them bond and understand each other better on a ninja - to - ninja level.