It could also be for the village. Naruto loves Konoha deeply. He knows that as a symbol of hope for the village, he has to appear happy and strong. If he shows his sadness or vulnerability, it might affect the villagers' confidence. So, he fakes happiness to keep the village's spirit high.
One reason could be to protect his friends. Naruto doesn't want his friends to worry about him, so he pretends to be happy even when he's facing difficulties. For example, when dealing with the threats from powerful enemies, he shows a happy face to keep his team's morale up.
Maybe it's because of his sense of pride. Naruto is a proud ninja. He doesn't want others to see his weakness. So, he pretends to be happy to give the impression that he can handle anything. He might be going through personal struggles like his inner turmoil about his past, but still puts on a happy front.
On one hand, it can strengthen his relationships. His friends might be inspired by his seemingly unwavering happiness. They might think that Naruto is so strong - mentally and emotionally - that they admire him more. For example, Sakura might see his happy face and feel more confident in their team.
It could be for the greater good of the village. There might be a prophecy or some sort of political situation where Sakura's pretend love for Naruto is seen as a way to strengthen the village. For example, their union (even if it's fake) could be a symbol of unity that would boost the morale of the villagers and make other villages see them as more stable and powerful. Also, Sakura might be pressured by the elders or some authority figures in the village to do this in order to maintain a certain image or alliance.
Happy Naruto fanfiction usually features a lot of celebration and joyous events. For instance, there could be a grand festival in Konoha to celebrate Naruto's birthday or an anniversary of peace. The story might also include Naruto using his skills in a non - combat, fun way, such as using his shadow clones to perform a big show for the village kids. The overall atmosphere is light - hearted, with little to no dark or tragic elements.
One possible reason could be for self - protection. By pretending to be poor, he might avoid unwanted attention. Maybe he doesn't want people to target him because of his wealth, just like in the original story where he was often in danger due to his fame. Another reason could be to better understand his friends who are actually poor. He wants to experience life like them and build stronger bonds with them.
One possible plot could be that Sasuke has been away on a long mission and has forgotten his own birthday. Naruto, who has been keeping track, decides to bring the celebration to him. He travels to where Sasuke is and with the help of some local people, arranges a small, intimate party. They share stories of their adventures and Naruto gives Sasuke a new headband as a gift, one that represents their combined journey.
A 'Naruto happy fanfiction' might focus on Naruto's family life. He and Hinata are raising their kids, and it's all about the cute and funny moments of family. Boruto and Himawari are getting into little misadventures, and Naruto is there to guide them with his wisdom, full of love and laughter in their household.
One reason could be that Babloo received an unexpected gift. It might be something he has always wanted, like a rare book if he is a book lover. This sudden surprise would make him happy.
One idea could be that all the characters in the Naruto universe come together to throw a surprise party for Naruto. They could gather in the Hidden Leaf Village square, with Iruka Sensei bringing a huge cake. Sasuke could return for the occasion, and they all share stories and memories of Naruto, highlighting his growth and importance in their lives.
A 'Happy Birthday Sasuke' Naruto fanfic could be about Naruto planning a surprise birthday party for Sasuke. He might gather all their friends from the village, like Sakura, Kakashi, and Shikamaru. They could decorate Sasuke's old house with symbols of his clan, the Uchiha crest perhaps. Naruto would also make sure to have Sasuke's favorite food, tomatoes, available in abundance. It could be a story full of friendship and nostalgia, showing how much Naruto values Sasuke.