Chapitre 1: Read Before Reading!
Welcome to this brand-new fanfiction, a crossover among numerous mangas/animes, thus creating a new class, Class S, in the universe of Classroom of the Elite! Before we start, I have a few points to clarify.
First of all, not all new characters will be in Class S; there will be some in every class. Next, here is the list of crossovers:
Classroom of the Elite
Kaguya-sama: Love is War
The Quintessential Quintuplets
Re:Zero (with adaptations to fit a modern world without magic, etc.)
Date A Live (with adaptations to fit a different context)
Assassination Classroom (with some adjustments, such as replacing the octopus teacher)
Danganronpa (without the context of despair and murders)
Sword Art Online (with minor adjustments for adaptation)
Bunny Girl Senpai
Kakegurui
Battle in 5 Seconds After Meeting (removing supernatural elements)
Spy X Family
Higurashi no Naku Koro ni (keeping the tragedy but removing supernatural elements)
Umineko no Naku Koro ni (without supernatural elements and modifying the tragedy)
Steins Gate
Dr. Stone
Saiki Kusuo no Psi Nan (without supernatural elements)
Food Wars (with a special appearance)
Oshi no Ko (without reincarnation but keeping the tragedy)
The World God Only Knows (without supernatural elements)
I think all of this is quite clear, isn't it? Not all these universes will necessarily be exploited in the same way, and some will not be present in Class S. Their stories will be adapted according to the needs of this fanfiction, with some age adjustments for certain characters. I hope you enjoy it, happy reading everyone!
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LEGEND:
I am Ayanokoji = Simply the declaration from its POV.
"I'm still Ayanokoji" = Ayanokoji's direct thoughts.
*BONK !* = A noise, an onomatopoeia or a sound.
Kiyotaka: ... = A talking character.
POV Riku = Simply a change of POV.
(Translator's Note: Hey, it's me!!) = Simply a note left by me, that should happen quite rarely.
... = Transition.
État de l’alimentation hebdomadaire
-- Classement
Power Stone 
-- Power
stone