Suzuki Chisato is a transmigrator who leads a fairly peaceful, laid-back life as a disciplinary committee member in Academy City.
Suzuki Chisato doesn't like getting involved in troublesome matters. Even though he can briefly see the future, he has no plans to do anything grand.
[Handle what I can handle], [Take care of what I can take care of].
That's basically Suzuki Chisato's code of conduct.
He wants to lie flat.
But meeting the esper named Misaka Mikoto changes the course of his life, and meeting the nun named Index makes him bid farewell to his old life for good.
Mages, espers, angels... and later, he transmigrates once again, arriving in a strange new world.
Faced with all this, Suzuki Chisato, a magician and an esper, decides to wield the Blade of the Soul to protect his life of lying flat.