I.
They're meant to be out there, enjoying the Yule Ball with their dates. Instead, they stand against the wall, watching their dates dance with other blokes.
"Well," Dean says awkwardly. "What do we do now?"
Seamus looks at him, grinning as he extends his hand. "Dance with me."
"Be serious."
"I am."
Dean hesitates, considering for a moment. Two boys dancing together... He isn't sure he wants that sort of attention.
But it's Seamus, his best mate. It's just for fun, just a laugh.
Dean takes his hand and allows Seamus to lead him into the sea of swaying bodies.
II.
If their dates hadn't abandoned them, they wouldn't have danced. If they hadn't danced, Dean might not have felt that spark. Without that spark, they might not have been here five years later, planning their future together.
"A happy coincidence," Dean says.
Seamus shakes his head, pulling him close. "No such thing as coincidence, love," he laughs. "It's the luck of the Irish."