Man that world is fucked up. What the hell is with so many people isekai'd by the gods or sages with overpowered abilities, only to serve as cannon fodder?
Even Denning is yet unsure if the betrayal will really happen or not. But at this point trying to convince Alice of the "event" is backfiring on him. Better to shut up and prepare so he can deal with it once it happens.
I do agree that Alicia and Denning don't have any chemistry, and personally...
It seems that no matter how shitty the isekai is, it can get an adaptation.
Still, this mango has justified its existence just because of the description.