Castiel has no idea who the face on the coin is, but it's obviously relevant to Dean, so he smiles indulgently, Hell forgotten when he sees Dean's face looking like that.

He reaches for the treasure, fingers skimming the flask and familiar amulet. He's surprised there are any coins at all, because he knows that Dean values these things far more than money.

The coins are almost buoyant, as if something under them is catching the slightest hint of current. He pushes a few of them out of the way and there's a familiar color, tattered and stained, underneath.

It's his coat.

Oh.

He turns his head to look at Dean, not quite able to hide the surprise on his face. Dean always says that they're family and he doesn't not believe Dean, but it's hard to believe that he's important enough to be included with all of these things.

But then Dean kept his coat in the trunk of the Impala when he thought Castiel was dead. He fought through Purgatory to find Castiel and Castiel is once again reminded that he should have more faith in Dean.

Licking his lips, he grips the front of Dean's coat, pulling him closer in the water with gentle insistence.

Before he can lose the nerve, he leans in to press his lips to Dean's, almost chaste save for the memory of being a succubus hanging in his mind.