This kinda just came to me, based off a desperate need for some T.F.W. fluff and friendship. Hope you enjoy.
Dean and Sam laying on the hood on the impala, staring up at the stars. They'd just finished a salt 'n' burn, and were enjoying the simplicity that accompanied it. Each was nursing a beer, both watching the stars twinkle up in the sky.
They heard the soft beat of wings, and Dean spared a glance at Castiel.
"What are you doing?" Cas asked quietly, surprised at the gentle expressions on their faces.
"Watching the stars," Dean said, gesturing up with his bottle. "Wanna join?"
Cas nodded, taking a seat on the edge of the hood before leaning back on his arms and tilting his head towards the sky.
"I was the one who put Orion in the sky, did you know?" He asked softly. "My garrison was in charge of making sure the stars were close enough to be seen by humans, but not close enough to kill them. It's fascinating how much humans romanticize things that could so easily kill them." He continued before falling silent.
The peaceful quiet was something they almost never got, and they enjoyed it. After a while, Dean asked a question about one star in particular, only to be told that it was Balthazar who'd hung it in the sky.
"He put it there right after he snuck out to go party in Sodom and Gomorrah," Cas said, frowning.
"What?" Sam laughed. "We have to hear this story."
Cas told them about what had happened, and the rest of the night was spent with tales about Heaven when it was fun.
Eventually they fell back in to silence, and Sam and Dean drifted off with Cas still leaning back on his arms, staring up at the Heavens.