Toaru Majutsu no Index: New Testament - Volume 16, Prologue: Holing Up at School, Starting with Swimsuits - Melt_the_Asphalt.

Lin An woke up and found himself in an Eastern Fantasy world.

In a world full of caped superheroes, supervillains, and monsters, Aldrich is worthless. 95% of humanity has evolved to develop superpowers, but Aldrich is one of the rare few that has no powers at all.

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.

Transmigrated into the book as a cannon fodder female supporting role, the ex-wife of the male lead who hasn't divorced yet. Gu Fuqiao just wants to say no!