Ron was, at this moment, rather close to hyperventilating. And one would assume that, as he was in an infirmary, this wouldn't have been a problem, but Madame Pomfrey was tending to a second year who had been jinxed with a charm a fellow classmate had made up on their own, and it was taking a rather long time to figure out how to reverse it. Professor Dumbledore would have had enough training to help poor Ronald if he had actually begun to hyperventilate, but unfortunately he was riveted on the figures of Draco Malfoy and Hermione Granger. Harry was also watching, and he wouldn't have known what to do anyways.
Draco Malfoy and Hermione Granger, as has been mentioned, where otherwise engaged and therefore in no position to help Ron. Ron, while breathing heavily and generally doing something which is commonly referred to as 'freaking out', wasn't think much beyond the lines of a rather dramatic and loud "NOOOO!" which was resonating through his head.
Harry, on the other hand, was watching the scene unfold with a sort of disgusted rapture that could only be compared to a young male watching a chick flick- a mix of horror and curiosity was plainly evident on his face. As Harry watched, he saw it in slow motion, like the play-back on his omnioculars at the Quidditch World Cup the summer before fourth year. And watching Draco Malfoy's lips purse in slow motion was not something he'd ever imagine, not even in his worst nightmares.
Professor Dumbledore was feeling a mixture of accomplishment and giddiness, the accomplishment having come from completed a task that he'd long to do since the four students in front of him had entered Hogwarts, and the giddiness coming from thinking about what horrible things he would have to deal with in terms of Draco Malfoy and Hermione Granger, should he be correct in his assumptions. But that is not all he was thinking. He was also thinking about buying a new bag of lemon drops, as his old stash was running dry very quickly, much to his horror.
Draco Malfoy was wondering what he was doing kissing a mudblood, why he had to love coconut so much, why Dumbledore had known about this particular weakness, how much he would have to bribe others to not tell anyone about it, whether or not The-Boy-Who-Couldn't-Take-A-Hint-And-Die and Weasel were going to try to beat him up, and also that Hermione Granger's lips were surprisingly soft.
Hermione Granger was thinking something along the lines of What happened? By the time she realized she was being kissed passionately by someone, that particular someone had pulled away and Harry and Ron had crowded her vision. Then she wondered briefly if one of them had woken her up, but soon everything was explained to her.
Three hours later, once Hermione was fully sure she was not still dreaming and it was possible to make a sleeping beauty-type spell, she began to become a little worried. The sly look on Dumbledore's face told her that there was something he knew that she didn't, and, judging by Harry and Ron's shock and slight disgust at the events that had occurred, they didn't know either.
And she highly doubted that Draco Malfoy was plotting with Professor Dumbledore about anything that could involve kissing her. She was also very surprised that Draco Malfoy had kissed her at all, and had also taken into account that Dumbledore had skirted around the questions pertaining to that matter in a particularly skilled way.
"Granger."
