[Kurama is thankfully not too concerned, it wasn't as if his mother was entirely alone these days and he had opted to voluntarily go to demon world, so being inaccessible wasn't entirely foreign either, but- they were actually trapped here for an undetermined amount of time. He couldn't even call her, to check that she was safe. Yusuke's loved ones are aware of what he's dealing with at least, while his own human family remains oblivious. The fact that he was the one keeping it that way didn't make it any easier to deal with. Of course, he's also unaware of Yusuke's more pressing fears that one of the demon kings might try to overthrow the whole situation. Kurama has context that Yusuke does not, on that topic.

The fox settles more comfortably as Yusuke rubs at his neck, as if subconsciously communicating a desire for him to calm down. The restless energy was certainly infectious.]

Being violently held hostage would appeal more to your way of thinking, wouldn't it?

[Is that a dig or an observation? It may be hard to tell with the tone of his delivery. Honestly, he should have realized - Hiei, as well, would find this more suspicious, having functioned the way he did before coming into their lives. They were both so straightforward about things.]

I think I prefer the festival, actually.

[Maybe because being a demon meant always living life waiting for the next shoe to drop, so this wasn't entirely unusual for him. It wasn't as if he got a normal human childhood, protecting his territory from other demons who tried to move in on it. At least here, they would be allowed a bit of a reprieve for normalcy on occasion, something he'd really come to enjoy living as a human all this time.]