They disappeared? Well, problem solved.
Well, as stupid as Asahi may be, but: If you don't know which side you should believe in and you have to pick one, it might really be for the best to stick with one side until you are offered prove, that you picked the wrong one.
The problem in her case is, it can't be proven, as she sees any prove as manipulated and she doesn't want to be in the wrong. Even worse, she can't imagine being wrong on such a large scale and her mind goes lengths to construct scenarios, in which she is still right. Up till now Asahi "actually" always has been right about nearly everything as everyone told her so. And as everyone told her so for her whole life, then something must have been wrong with the world she lived in till today, if that happens to be a false fact. And a damaged, broken world, now that's unlikely, isn't it? The world is the world, it is absolute and as it is the reality we live in, we accept it as it is. And so did she. Only poor MC has been wrong all her life and therefore NEEDS Asahi's guidance, as she is now in danger without her.
Maybe she isn't as stupid as she is bratty and self-righteous. I still can't forgive MC's mother for what she did to her own daughter and to Asahi. As she knew what's wrong with her, she should have tried to break the charming curse, contacted somebody, who could do that, or at least leave her alone without sacrificing her own daughter.