Stress!
Stress, stress, stress! John Kingside - despite having his own fair share of talent, with several well-marked OWLs up his sleeve, quite nearly making Gryffindor Quidditch Captain, and being an excellent Chaser in his own right - was absolutely worn to the bone. Spending the vast majority of the first term having three shattered limbs remedied by Tulojow, it was questionable whether or not he'd even be ship shape for the first game of the season - he was, of course, but his performance was less than satisfactory (to himself, at least).
Practicing nightly on the Quidditch pitch was both worrisome, due to its rule breaking nature, and a time consumer, due to the disgruntling level of NEWT classes on his schedule and the voluminous amount of homework accrued by such. Add it all up, and you had one peeved and tired Kingside - whose eyes had recently developed sightly bags and whose lack of appetite had left him slightly less substantial than usual.
As such, it was now - during the free period he shared with a handful of other Gryffindors in his year - that Kingside had chosen to sneak off to the Third Floor's abandoned corridor and do a bit of homework he had neglected; the common room was occupied by a series of noisy folk, the dormitory too dim for the Chaser to focus properly. No, this typically uninhabited stretch of hallway was just right. Wait a tic --
"Wotcher," Kingside shot at Moira, with whom he was thoroughly unfamiliar; his eyes roved over the young white owl and notation book in front of her. What was she up to, hrm?