There may have been a few, small cues Yukiko could have picked up that 'Yu' was acting odd- he seemed a little more jittery than she would no doubt be used to, given the small start he gave when he felt the jacket's weight on his shoulders. As well, he seemed to blink at her with a small amount of surprise that seemed to hold a little longer than would have normally made sense. But hey, he could have just been sick or something, right? That'd explain why he was a bit paler than normal.

He responded back after a moment, dropping his look from her face and to the ground. "You're probably right." About the jacket bit, cos he had no idea what she meant about doctors. At least she wasn't making a big deal of where she'd found him, right? "You don't need to..." He shrugged at the coat, seeming a bit awkward at the thought of taking a coat from a girl. "Won't you need it?"