Goodbye doesn't feel right on Castiel's tongue, but he tries to say it anyway.
Because he was facing Dean, at the top of a hill, and at the bottom were demons.
Thousands and thousands of demons, and they were coming. Fast.
"Goodbye, Dean." Cas tried, the words heavy and thick on his tongue.
"No." Dean said simply, not looking at Cas. "No."
"What?" Cas stared at Dean, confused.
"Not goodbye. I'm not saying goodbye to you."
"Then what?" Cas looked away, towards the endless hoard of bodies advancing their way. "What do we
say?"
Dean gave the tiniest of bitter smiles.
"Do what you always do."
Cas knew what he meant.
"Hello, Dean." He choked out, voice thick.
Dean's expression crumpled and he finally turned to look at Cas.
"I'm gonna miss you, Cas."
"I'm going to miss you too, Dean."
And that was their goodbye.
They didn't say anything else, but when the demons burst over the hilltop, their hands were clasped tight.