The fact that she stiffened didn't go unnoticed and Rose moved the hand back to her lap. “I'm from London,” she offered before her eyes widened slightly. It was Rose's turn to be surprised. She really hadn't expected Homura to accept the whole 'I've traveled through time' line. At least, not so readily as fact. A general theory maybe, but 2015 seemed a bit too close to her own time for it to be something that would be accepted so easily.
Unless people had stopped writing away aliens and what not since the whole Downing Street disaster.
“Oh!” said Rose, feeling as shocked as she probably looked. “Really? Um . . . I don't know how it works exactly. I mean, I couldn't tell you the mechanics of it or anything. But yeah, any time. Future. Past. Present. Kyoto was the – uh- sometime in the thirteen hundreds, I think. And my first trip was to the future. The year five billion, if you can imagine.” She smiled and then slouched down in her seat a bit. It was easier to relax, even just slightly, when she actually had a proper answer to give. “It can go anywhere, really. Not just different times. But into space too.” She pointed toward the sky. “Anywhere you might fancy. Farther than you can see.”