Classroom of the Abyss

Ayanokoji Kiyotaka was always shrouded in darkness. An abyss, concealed within his core, always following him wherever he wishes to journey.
That mystery enveloping his whole being; that paradox covering his soul... what happens if he travelled into a world of Wonder, where complexity and mystery coupled by a pit of chasm are a pillar of its existence, where he is nothing? The days where he remained as the peak, as an inhuman domination of statistics (and not only), are now shattered into a foolish perception... But there, a hole was dull and deep within his heart; what makes him human and truly complete: What makes him better.

On a typical morning, where a veil of sunrise shines through the aperture of the windows, occurs a strange phenomenon within the classrooms of ANHS - advanced nurturning high school.
While teachers were doing their class as usual, a powerful, reality-biding blue light materializes, transferring students into a sea of clouds? [...]

"Greetings, Children of God! I must apologize, for you have been transported against your will into another dimension... But fear not, as I will guide you through the discovery of this new journey." A beautiful, mature and selfless looking woman calmly said, a loving smile present on her peaceful face, coupled by a reassuring glee emanating from her accompanied by an angelic appeal, altruistic and worthy of trust. It was as if I was looking at a divine saint.

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I do not possess any of the characters from the work classroom of the elite. If anything character has the same name, traits, or illustrations than another work you know, it isn't mine at all. Only the plot is mine. I do not take credits from anything aside from the plot as many details could be stolen or inspired from other works. Feel free to manifest yourself if anything looks like your own work as I will not cite you out of laziness