Narcissus + Doomsday + Cthulhu + Imaginary World View + Amnesia + Curiosity (Do Not Enter the Thunder)
It's probably an adventure story about a mentally ill Narcissus and a pair of brothers and sisters who form a pair and leave the last city in the apocalypse to achieve their own goals.
Protagonist: Melanza Lyell
Main supporting roles: Jessica Griffin, Thoroseth Griffin
Purpose: A little bit curious, don't let those who are rogue enter