In this type of fanfiction, a major theme is often the fragility of the male ego in the face of unrequited love. Naruto, despite his strong exterior, is broken by Sakura's lack of romantic interest. Another theme could be the idea of lost hope. Naruto may have hoped for so long that Sakura would come to love him, but when that hope is finally extinguished, he sees no reason to continue living. Additionally, themes of loneliness and isolation might be present as Naruto may feel completely alone in his unrequited love for Sakura.
Sakura might be in shock at first. Unable to believe that Naruto, who has always been so strong - willed, could have ended his own life. As she processes it, she could become angry, not at Naruto but at herself and the situation that led to this tragic outcome.
There could be fanfictions with that plot. It could be that in the fan - created world, Sakura has been really cruel to Naruto's feelings. She might have chosen someone else over him repeatedly and publicly humiliated him for his feelings, which could shatter Naruto's self - esteem and make him feel like there's no way out but to end his life.
One common theme is unrequited friendship. Naruto's deep - seated friendship for Sasuke not being reciprocated in the way he hoped could lead to his downfall. Another theme could be the idea of sacrifice. Naruto may sacrifice himself believing it will save Sasuke from his dark path.
It could be a miscommunication. Maybe Hinata said something that Naruto completely misinterpreted in a very negative way, like she didn't love him anymore or she blamed him for something major. This misunderstanding could be so great that Naruto loses hope and takes his life.
This is a very dark and unexpected plot. One possibility could be that Naruto is burdened by some extreme situation related to Hinata. Maybe he feels responsible for her getting into a great danger or a situation where her life is ruined, and his sense of guilt overpowers him, leading to this tragic end.
Yes, such fanfictions exist. In these fictional scenarios, Naruto might kill himself because of Sasuke for several reasons. Naruto's whole life has been centered around Sasuke to some extent. If he feels that he has failed in his mission to bring Sasuke back to the right path and that the situation has become so dire that the only way to atone for his 'failure' is through his death, he might do it. Also, if Sasuke were to cause harm to someone Naruto holds dear, like the village or his other friends, and Naruto feels powerless to stop him in any other way, he could choose to end his own life as a last resort.
There could be. Fanfiction allows for a wide range of interpretations and alternate storylines. But it's a really extreme and disturbing concept considering the bonds that Naruto, Sakura, and Sasuke share in the official story. It would be a very different take on the characters, and most fans who love the original story would probably find it hard to accept.
This is a really dark concept. In fanfiction, such a scenario might be written to explore extreme emotional distress. Maybe the author wants to show how much pressure Naruto has endured secretly, and on his birthday, which is supposed to be a happy day, it all becomes too much to bear. However, in the original Naruto story, Naruto is a character full of hope and perseverance, so this is a very different take.
I'm not sure if there is exactly such a titled fanfiction. Fanfiction varies widely in themes and plots. It would be a very dark and disturbing concept for Harry to kill himself because of Hermione. It might involve some extreme interpretations of their relationship, like unrequited love gone horribly wrong or some major misunderstandings that push Harry to such a desperate act.