Vianna's gaze rose as did Ferris, now no longer looking down at the boy but up instead. As he hugged her, the girl hugged back with unexpected strength - but then she remembered this was obviously not going to have a good effect on his back and she immediately let go, jumping back. "So--sorry," she muttered, feeling ridiculously stupid for having forgotten about his back when she had just been nagging him about it less than a minute ago. She shook her head slightly to herself before looking up at him again. "Sleep well, Professor. I'll see you tomorrow."