Dean had forgotten that Castiel already did die for him. Once. With Raphael. The memory of such a painful death still haunted him however it needed to be done. He was happy to, to die for Dean because he cared for him. Even if it was not this Dean... Even with everything this Dean had done in his future. Castiel would die for him, time and time again.

The kiss was welcomed, Cas lips twitching against Deans as he brushed his hand over the pit of the hunters neck. Tipped his head back, tilting his head as he looked up to the future hunter. "...I am sorry, Dean. I did not mean to worry you."