Every single Weasley was at Hogwarts for the Tri-Wizard Tournament, and it was making Draco Malfoy extra annoyed. Every time he saw one of them, he would call insults to them. Other than Ron, it was mostly because he had been told to by his father long ago. Like a life lesson that had been drilled into his skull.
As much as he insulted and hated them, he knew every one of them by name. There was:
Ginny – 13 and a third year
Ron – 14 and a fourth year (seeing as he was in the same year as him)
Fred and George – 16 and 6th years
Percy – 17 and having graduated last year.
Charley - 18 and graduated (he's probably more like 20, but I'm allowed to use my imagination :P)
Bill – 20 and graduated
Ron and Harry always said he didn't know their names, though they must have missed the part where he pointedly insulted them each using their names. But they were probably far too busy being offended than to notice details.
But because the only time Draco and the Weasleys' talked was when they were sneering at each other or insulting each other – or both – no one warned him about Charley.
So, when 4th year Draco Malfoy met the 2nd eldest Weasley in an empty hallway, he didn't hesitate to insult him.
"Hey, Dragon Breath, did all that smoke cook your brain so much that you've gotten lost." He sneered. For a moment the Weasley just looked at him, before breaking in to a huge smile. Now it was Draco's turn to just stare at him. Charley Weasley's smile was probably the most gorgeous thing anyone had ever seen in the world.
"I'd watch who were calling Dragon Breath. Your name does mean dragon, you know." The older boy chuckled. Even with his breath taken away, Draco still managed a decent reply. "At least I'm not so ashamed of my family I ran off to livee with Dragons."
He was expecting a outburst, like Ron or the Twins gave when their family was being insulted rather than just them. But Charley's reaction absolutely shocked him.
He burst out laughing.
Draco stared as the boy literally doubled over in laughter. "I think Fred and George are worse than my dragons," he said, still laughing.
Before he could think about it, Draco realized he, too, was laughing.
Horrified, he put a shocked hand over his mouth. After a minute of looking at the blonde, Charley spoke again. "Don't worry, I won't tell anyone I made Draco the-Weasley-hating Malfoy laugh at one of my jokes," he said with a wink.
"L…l…like I'd laugh at one of your jokes," Draco stuttered. "I was…laughing at how stupid you sounded." It was the first thing that popped into his head but he thought it sounded pretty decent.
Charley looked at him, amused, for a moment. Then, out of nowhere, he stepped forward and kissed the Slytherin Prince.
He pulled back after a second, chuckled at the blush on the 4th years surprised face, and walked away.
"See you later, my dragon." He called over his shoulder.