Yeah... Tsukasa can accept living anywhere... so long as it is with her beloved Nasa. Hell, she was probably fine with any living arrangements for most of her existence. Which... to be honest, it was probably mostly 'existing' until she met him, I feel. Sure, she's enjoyed things, but I really do get the impression that it was very hard for her over the implied thousand-plus years she's been wandering the world since becoming immortal. I'm sure she had happy memories with this 'Tokiko' woman, as well, that's come up a few times in relation to her past (I say that, but I know for a fact they are like sisters to each other- far more than Tsukasa and Chitose).
But it really does feel like all of that has paled in comparison to this short week or so she's spent with Nasa.