After a crisis on Earth, humanity, or should I say the entire world, changed after an incident.
In the past three decades, the world drastically changed in terms of technology which includes drones, world order, and many more. It was actually accomplished by only one person named Takahashi Tsubasa, with the help of his advanced drone technology. He was also awarded by the world government" the UN"for his creations.
According to the history that was told to children is that the world was at crisis situation which tells us that at different locations of across the world , portals started appearing out of nowhere, and from these portals, a monster emerged. It was described as that of having a big body like a lion without fur and just bare skin, with only one eye on its forehead. But what was more terrifying was its sharp fangs and Jaws as terrific , which appeared like vampire fangs. The monster with it's sharp fangs, could easily transform anyone into them by biting anyone .
This incident occurred all over the world. After that, a barrier appeared out of nowhere in each country and covered and isolated everyone for a period of time . There was also an instance where whole countries disappeared through portals, which surprised the entire world and caused a lot of fear and state of emergency and some of countries, they were teleported to the different countries and it was really close like more than Japan parts were teleported to near India which caused confusion and territorial problems between many countries across the globe. Which was later resolve by treaty signed by the new world after the change.
There were also stories of how one person among the crowd at each portal location was there to fight back against each monster, and the monsters were then sent back after furious defeat by the people at every portal gates and the monsters were dragged by people back to portal gates . Each individual from a different location entered the portals, and they never returned; then the portals were never seen again, and the mystery of the people who helped them remained a secret.
Then the era of drones and ai robots came along, led by the scientist Takahashi Tsubasa, which helped to maintain the environment in particular areas that were in great need because of the teleportation incident. This was nearly took half a year to accomplished by drones that could withstand for a few days (exactly 2-3 days) without any disturbance and it was later that it was perfected. (which withstand more than a year)
After a year, people started to adapt to the new laws, environment, and technology, along with a lot of new changes that happened in the past three decades.
Crimes also increased, and big drones were used to find the locations of criminals. Robots were deployed to capture criminals, but this only lasted for two decades. Criminals only grew because of that, but the robots and drones were also further enhanced to capture criminals.
A few years back (exactly 3-4 years from the present time), the crime rate started decreasedly due to an unknown vigilante. It is still not known who he is, but he has been a great help to the people and the government . Last year, he announced his name as Nitro after helping people for the last three years; he revealed himself in broad daylight as well.
Takahashi Tsubasa has a son and a daughter; actually, he had three children, but after his wife went missing, and before she went missing, one child (the younger child) got lost at a carnival after she went to search for the younger child but goes missing instead without any trace.
His son kouzuki Tsubasa is genius like his father and accomplished a lot things but kept it secret from his father, if you wanna know about it then read " The nescent of vigilante".