Dean worked with Novak on a couple cases after their first encounter. They were a good team and their superiors were worried they were getting too close.
"I'm being reassigned." Novak said one day after they had killed a CEO of a big company. They were sitting on a park bench, Dean was trying to dislodge a bite of hamburger from his throat and Novak looked very worried. Dean spit out the food into the grass and looked at his partner.
"What? Why?" Dean growled. Novak looked down and a blush crossed his face. Dean had never seen Novak blush, he thought it was cute. Wait, what? I like women. WOMEN! Dean chastised himself. But he knew he was trying to fool himself. He cared, a lot, about Novak. And he knew Novak cared enough about Dean to tell him about the death of his sister, Anna, 3 years ago.
"My...our superiors think we've become too close. So I'm being reassigned." Novak said as he looked at the pedestrians passing by.
"Where are you going?" Dean asked. Novak gave him a pained look. "You can't tell me?" Dean growled. Novak looked plain uncomfortable. Dean threw his food into the trashcan by the bench and faced Novak.
"I'm not angry at you. I'm angry at the big guy. Don't give me that look." Dean said. Novak looked confused.
"What look?" He asked. Dean raised an eyebrow.
"You gave me the 'I'm sorry' look. It's not your fault." Dean reasoned. Novak looked relieved and scooted closer to Dean on the bench. They both didn't realize that Dean leaned into Novak.
"Can you tell me something before I never see you again?" Dean asked, he didn't look at Novak. Novak took Dean's hand and intertwined their fingers. It wasn't awkward because they were saying goodbye.
"Anything." Novak whispered.
"What's your first name? I'll tell you mine." Dean asked. Novak took a deep breath. In. Out. In. Out. Novak pulled away and stuck his other hand out.
"Castiel. And you are?" Novak asked. Dean smiled widely and took Castiel's hand.
"Dean. Dean Winchester." Dean said. Then something happened that Dean had never seen. Castiel's face split into the happiest smile Dean had ever seen. Castiel leaned forward and kissed Dean's cheek. Dean sighed.
"Goodbye Dean." Then Castiel got up, touched Dean's cheek gently, and walked away.