In a world where at least 80% of people for some unknown reason possess a superpower known as a Quirk. There were as a result of at least 20% of the people that did not have any power at all. This turned out not to be the ideal that was originally supposed to happen. Some saw the emerges of Quirks as a dangerous thing an infection or disease that spread across the world infecting everyone.
However, what was now known as Quirks were not all good as they all had a downside which in the current day was not that much of a common worry anymore. This was not just that they had become so commonplace that not having one was current abnormal. It was not like this was that long ago either as only around 40-50 years ago being Quirkless was not seen as abnormal. It was probably roughly even at that time or getting close to it.
Nor was it the fact that people collectively realized that unrestricted and unchecked usage of their Quirks could lead to a mutually assured destruction scenario eventually. After all, Quirks were not remaining the same or getting weaken. They were only getting stronger with each passing generation.
Which led to the downside that in the early days of Quirks was the biggest fear or at least one of them (if it was not just having one in the first place). That being the negative effect it had on the body as the stronger the quirk the stronger the backlash that came from pushing beyond its natural limit. That something that even in the current era has not been properly addressed to the degree that no one suffered because of their quirk.
Quirks were a side effect of a machine not functioning properly. Thus those that thought quirks were originally not natural were correct however if quirks were a side effect than what was the intended effect. That was something that was about to make itself known as while the first machine might have broken upon usage by its four creators but the intended effect itself became a collective quirk that the four of them somehow shared. One that strengthens over time within each of their bloodlines. Each direct descendant being mistakenly thought of as quirkless as a result of inheriting this quirk. One that did not affect other than its intended purpose.
The current descendants of those four creators were scattered across the four corners of the world as it finally reached the point of no return. The Quirk Singularity though rather than becoming a power no one can control instead this merely served as the trigger to set off the bomb that had been building with these four for generations.
Without warning the in an act that mirrored the original birth of Quirks themselves. The four of them just randomly started admitting light from their bodies. Though it was just a glow restricted to them alone a light that spread across not just their general around but kept growing and growing until it expanded to cover the four light covered the entire of the world itself. Each of the four corners covered by one of the four possessors of this quirk.
The effect of this light was petrification and the ones it effected were anyone with a Quirk. Thus it was on this day that 80% of people were petrified in an instant.
