What is the White Room in the Classroom of the Elite?

The first season of Classroom of the Elite engulfed fans in a plethora of mysteries that weren't adequately addressed in the final episode, but season 2 offers some hope.

I still don't understand how someone could read the entirety of

White Room Unveiled (Classroom Of The Elite Fan-fiction) - Chapter

White Room Masterpiece : The Reaction - Jasmine Sky - Wattpad

White Room, Villains Wiki

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What Is The White Room In The Classroom Of The Elite?

Create Your Own WHITE ROOM Classroom of the Elite

The White Room Troubles - The White Room Troubles Volume 1 - Wattpad

How WHITE ROOM Students Became Extremely Smart

The White Room's masterpiece and the first-year students. : r