Well, in the Naruto universe, Naruto's confession to Hinata would bring a lot of positive changes. Since Naruto has always been the center of attention, his relationship with Hinata would be a big deal. It would probably strengthen the bond between the Uzumaki and Hyuga clans. Also, Hinata has always been a quiet and supportive character, and with Naruto by her side, she could become more confident and play an even bigger role in the village's affairs.
One of the most emotional scenes could be when Naruto finally realizes his true feelings for Hinata. Maybe it's after a dangerous battle and he sees Hinata there, always supporting him, and it just clicks. Another could be when he actually confesses. The look on Hinata's face, probably a mix of shock and overwhelming joy, would be really moving. And the moment when they embrace for the first time after the confession would also be super emotional.
It's popular because the relationship between Hinata and Naruto has been a long - developed one in the original series. Fans have been rooting for them for a long time. So, fanfictions about Hinata confessing give fans the satisfaction they didn't get fully in the original work.
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.
There's a fanfic called 'A Confession Long Awaited'. In this one, Hinata's confession is a turning point in their relationship. It's set after a big battle where they both realize how much they mean to each other. The story does a great job of showing Hinata's strength in being able to be so vulnerable. And then there's 'Confessing My Love, Hinata - Style' which is a more light - hearted take on her confession, with some cute and funny moments between the two characters.
Often, Sakura is initially shocked. She may have always seen Naruto as a friend or a teammate. But then she starts to recall all the times Naruto has been there for her, like when Sasuke left and Naruto promised to bring him back. This makes her re - evaluate her feelings towards Naruto. Sometimes in fanfiction, she accepts his love right away, while other times she needs more time to think.
Often, in fanfiction, Naruto realizes his love for Hinata gradually. He starts to notice the little things about her, like how she always blushes when he talks to her, or how she's always there to support him no matter what. As he spends more time with her, these small details add up, and he finally understands that he's in love with her.
One heart - touching moment is when Naruto bares his soul during the confession. He might talk about how Sakura's smile has always been his motivation. For instance, in a dangerous battle, seeing her smile in his memories gave him the strength to keep fighting. Another moment could be when he gives her a meaningful gift during the confession, like a flower that has a special significance in their shared past.