Toaru Majutsu no Index: Genesis Testament - Volume 1, Chapter 4: Interaction with Another World, the Starting Point — “R&C OCCULTICS Co.Ltd.”

In the most popular 3D keyboard online game “Tomorrow”, an ordinary player, Zhang Zhiyin has a less common hobby–that is to visit Dr. Y, the ultimate boss – giving him gifts and hugs.

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.

Childhood sweethearts.
The most popular person in school is my childhood sweetheart.

- Description from Novelupdates

“World” is a game renowned for its remarkable freedom.

In “version 3.0”, I made the decision to maximize my focus on boosting magical abilities!

All stats now revolve around magic! But In turn, I embraced a substantial number of disadvantageous traits.

However, that is inconsequential. I am determined to forge the ultimate Wizard character, It matters little whether the character’s outward appearance resembles a walking corpse.

Yet… What is this?

I have suddenly transformed into that very character – a character with prodigious talent, yet unable to survive a single day without relying on drugs.