One possible plot could be that Naruto sacrifices himself to protect Sakura from a powerful enemy. Maybe he uses a forbidden jutsu that drains his life force but saves her from certain death. Sakura would be left in shock and grief, and this could lead to her seeking revenge against the enemy or trying to find a way to bring Naruto back, perhaps through some ancient ninja magic.
Well, I'm not sure about a single highly recommended one. But in general, in these fanfictions, Naruto's death for Sakura can lead to many different plot developments. It could make Sakura stronger, or it could drive a wedge between her and other characters who might blame her in some way for Naruto's sacrifice.
Sakura would be devastated. She would probably blame herself for Naruto's death since he died protecting her. She might go into a state of deep depression at first, withdrawing from everyone.
Sakura would likely be devastated. Naruto has been her friend and teammate for a long time. His death would leave a huge void in her life, and she'd probably go through a long period of mourning.
Common themes are love, loss, and growth. The love Naruto has for Sakura is central. His death brings a great loss to Sakura and the whole Naruto world. But out of this loss, Sakura may grow as a character. She might become more independent, learning to face challenges without Naruto's help. This type of fanfiction often delves deep into these emotional themes, exploring how the characters are affected in complex ways.
One possible reason could be that she sacrifices herself to save Naruto from a powerful enemy. In the heat of battle, she might put herself in harm's way to ensure Naruto's survival.
Naruto might also try to remember Sakura in a positive way. He would cherish the memories they had together. He could start initiatives in the village in her name, like promoting medical ninja training more, since Sakura was a great medical ninja. He would slowly turn his grief into a force for good in the village.
One consequence could be Hinata's complete emotional breakdown. She has always been in love with Naruto. His death would shatter her world. She might become withdrawn and lose her will to fight. In the Naruto universe, she is a strong - willed kunoichi, but this event could change her entirely. She could also vow revenge if Naruto's death was due to an enemy, and this could lead her on a dark and dangerous path of seeking vengeance.
Sasuke would be deeply affected. He and Naruto had a complex relationship, from being rivals to friends. He would likely feel a sense of guilt, as if he should have been there to protect Naruto. Sakura would be heartbroken. She had always cared for Naruto, and seeing him die in such a tragic way in front of his parents would make her feel helpless. His parents, on the other hand, would be in utter despair. His father might feel like he failed as a father again, not being able to protect his son this time either.
Perhaps Naruto is poisoned by a powerful new villain. His parents are revived just in time to see him succumb to the poison. This event could trigger a series of events where his friends and the entire village vow to avenge his death. His parents might then decide to stay in the living world to help in this quest for vengeance, despite the rules of the afterlife.