Guys, I've started the Arc Eloise alongside volume 5.
To give you an idea of the concept, as you will have realised, Malika's story follows directly from the events Eloise experienced before the prologue.
I therefore need to explain several points through Eloise's Arc, before continuing with Malika's adventure:
How did Eloise come to the despair she describes in the prologue?
How she became Eve's slut at her BDSM parties.
How she met Fatou and her gang.
Why Fatou and her gang hate Eve.
Here is a short passage (just from the dialogue) between Eloise and Fatou! to give you the tone of this Arc.