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It was Dean's birthday and Cas wanted to surprise him. He had decided to do this a long time ago, but he was stressed about Dean's reaction.
Dean gulped when he came home and saw Castiel naked on the bed with his hands tied to the bed and moved closer to him, it was the best surprise he could have had after a tiring day at work.
He kissed Castiel's lips and touched his naked body, bit his nipples and sniffed Cas's neck and closed his eyes from the good smell of it.
He took the lube that was next to cas, put it on his fingers and opened Castiel's legs and lifted it up, then he inserted one of his fingers into it, closed his eyes and closed his eyes from the good cold feeling of the lube and dean's fingers inside him.
He inserted his second finger and tried to get Cas used to it when Cas begged
He immediately took off his clothes and touched his dick and inserted it into Castiel.
They were both moaning and while moaning Cas was saying loving words to Dean which made Dean feel like he was the luckiest person on the planet.
"happy birthday babe"
Cas smiled and whispered into Dean's ear as he lay on top of him listening to Castiel's heartbeat
"I love you was the best surprise of my life"
He kissed Castiel's lips softly