F.O.R.C.E.
(Inspired by SCP, F.E.A.R., and Doctor Who)
In the middle of Tokyo, there is an explosion, a flash of colour and light and sound, and then a thousand people suddenly die.
From out of a freshly made hole in the ground, several individuals in garbs and robes slip out into the chaotic night. A prison break, a great escape.
Only this wasn't any ordinary prison, and these weren't any ordinary prisoners.
Immediately, hero society is put into action to try and contain the escaped prisoners, and Class 1-A are marshalled alongside a secretive black ops hero agency known as the Fast Operations and Response Command Entity, or F.O.R.C.E. for short, to capture them. Class 1-A are put off by how typically unheroic these agents were acting, seeming to be more ruthless and militaristic than the average hero, but are forced to bite their tongues and keep their thoughts to themselves.
Soon enough, the students begin encountering the escapees, but are confused as to why they are all young people, ranging from children to teenagers to young adults. Worse yet, they all have extremely powerful quirks, powers so extreme that they could even be considered supernatural.
And this is where the story shifts from a shounen to something closer to horror. Each of these former prisoners have quirks that can bend and break not just the minds and bodies of those around them, but could manipulate the fabric of reality itself, setting them apart from the general quirk users as something far more eldritch and inhuman.
One prisoner could manipulate the dreams and nightmares of others, even pulling out those dreams from the heads of the people they were watching and superimposing them onto reality.
Another could remove all the oxygen in the air in a hundred mile radius, suffocating everything around them.
One could erase the minds of the people around them and turn them into their mindless puppets.
One could go forward and backward in time, creating unstable time paradoxes that threatened the timelines.
And another could grant wishes to anyone, altering the universe around them no matter how large or small or safe or dangerous the wish.
These are the children of the quirk singularity theory, the living and breathing examples of the ideal that quirks are becoming more and more powerful with each passing generation.
And there are more of those with quirks like these being born with each passing generation.
F.O.R.C.E. are these children's jailers. They are the wardens of Black Site Olympus, a secret prison that sought to study these innocents and their quirks, poking and prodding and cutting them open to see how they could use their quirks to their advantage.
And now those children have escaped, and the heroes and F.O.R.C.E. are hunting them down for it. Some of those escapees want to escape Japan and seek out their freedoms, but others wish to exact their vengeance for what has been done to them by hero society, and begin to turn their indescribable powers against those who hurt and tortured them.
But worse yet, All for One has seen the quirks that have been unleashed onto the world, and wants to take them. He wants to take them all...
This idea is meant to be a premise of a horror story, much like the inspirations that this story has been based on.
The idea of there being a quirk that can be best described as eldritch is something that has been interesting me for a while. The idea that there could be a quirk out there that is so supernatural that they defy the common laws of the universe and bring madness as they go is fascinating to me, and I really hope someone picks up this story and makes it to be their own.