r/KumoDesu

In Ronandt’s chapter, he teleports the party to D by touching Sariel and using “the connection to the system.” He senses two presences connected to the System, one overwhelmingly larger than the other, which he takes to be D. The other he guesses is the ebony god. He says the teleport will take them “beyond our world,” and they arrive in a place of pure darkness where D is sitting alone.

What confuses me is that D’s space seems to be outside the world, yet the party still uses System skills there. The novel doesn't explains whether D’s space is actually inside the System’s reach (or at least I didn't found).

Also, is Güliedistodiez connected to the System too? Ronandt’s guess about the second presence made me wonder.

Does anyone know if the novel or the author ever explains this? Or is it just a plot convenience?