Well, Naruto is a really strong - willed character. So, at first he'd be really hurt. But then, he would probably try to figure out why his family has forgotten him. He might go on a journey to find answers, all the while dealing with the pain of this rejection. He could also be angry at his family for forgetting him so easily, especially considering all he's been through.
Initially, Naruto would be in shock. He'd try to talk to his friends like Sasuke or Sakura, but when they look at him with blank stares, it would break his heart. He would feel like an outsider in his own village. But then, his ninja spirit would kick in. He would start investigating. He might think it has something to do with a new enemy or some hidden plot. He'd be on a mission to not only get his friends and family to remember him but also to protect the village from whatever threat caused this forgetting in the first place.
Naruto would probably be really hurt at first. He's always been someone who values his friends and to be forgotten on his birthday would sting. He might try to hide his disappointment though, putting on a brave face.
At first, Naruto might be shocked and heartbroken. He has always longed for family acceptance, so being banished by them would be a huge blow. He could feel betrayed and angry, especially if he doesn't understand the reasons behind it.
Naruto might initially be heartbroken. He's a character who values family and connection deeply, so rejection would hit him hard. He could go into a state of self - doubt, wondering what's wrong with him.
Naruto may try to find out the reason why he is forgotten. He will start by reflecting on his own actions. Maybe he thinks he has done something wrong that made his family forget him. Then he will strive to correct it. At the same time, he might also seek help from his friends like Sasuke and Sakura, who always stand by him.
He could meet an AU version of Hinata who is more assertive and outgoing. Maybe she's a powerful ninja in her own right and not as shy as in the original story.
In the 'naruto forgotten by family fanfiction', perhaps there's some kind of curse or misunderstanding that makes his family forget him. Naruto would then have to struggle not only with the normal challenges in the ninja world but also with the emotional pain of being forgotten by those who should love him the most. He may try different ways to make them remember, like showing great feats of strength or kindness, and along the way, he could make new friends who become like his new family.
The 'naruto forgotten by family fanfic' might explore Naruto's emotional journey as he deals with being forgotten. He could start to question his identity and his place in the family. As he tries to get his family's attention back, he may discover secrets about his family that were previously hidden. He might also face challenges from those who don't want his family to remember him, and he would have to fight against them while also trying to re - establish his connection with his family.