It could be due to a strange natural phenomenon. There are theories about certain areas on Earth having abnormal magnetic fields or gravitational anomalies that could potentially create a portal through time. In the context of a modern - day story, perhaps a group of scientists discovers such an area while doing research. They unknowingly step into a portal that takes them back to WW2. This would be a really exciting and unexpected turn of events in the story.
If someone went through it, they would likely face a huge culture shock. The language, the way of life, and the values in WW2 were very different from today. They might also be in danger, as WW2 was a time of war with battles and bombings everywhere. For example, if they landed in a war - torn city, they would have to quickly find shelter and figure out how to survive.
I'm not sure specifically what the 'hunters day after ww3 story' is about without more context. It could potentially be about hunters in a post - World War 3 world, perhaps their struggle for survival, how they adapt to the changed environment, or their role in the new social order that emerges after the war.
I recommend the modern romance novel," It's You ". Although the male and female protagonists were doctors and patients, the main location of the story was a restaurant, and the female protagonist was the restaurant manager. The male protagonist often went to this restaurant because of food problems. After the two met again in the restaurant, they began their love story.
The main characters in the 'hunters day after ww3 story' might include the hunters, of course. There could be a family of hunters, for example, with a father figure who is the most experienced, a mother who is more empathetic and good at taking care of the group, and their children who are learning the ways of hunting in this new, dangerous world. Additionally, there could be other characters like a local leader who tries to bring some order to the post - war area and may or may not be in conflict with the hunters' way of doing things.
There could be demons with special knowledge. Naruto might meet a demon who knows about ancient ninja secrets or prophecies. This demon could either help or hinder Naruto depending on its motives. He could also run into demons that are in exile from the demon world, and they might be more willing to cooperate with Naruto as they see an opportunity to return to their world through the portal he opened.
One potential consequence could be the release of powerful demons into the Naruto world. This would disrupt the existing balance of power. For example, villages that were previously in a state of relative peace might have to unite against the new threat. The ninja way of life could change as they adapt to fighting these otherworldly demons. Also, Naruto himself might face internal struggles as he realizes the full extent of what he has done by opening the portal.
One inspiring D - Day story is about the paratroopers. They were dropped behind enemy lines in the dead of night. Many faced rough landings, getting caught in trees or injured on impact. But they quickly regrouped and began their missions. They disrupted German defenses and communication lines, which was crucial for the success of the D - Day invasion as a whole.