One of my
bingo squares is wingfic. I wrote the very beginning, but never did anything with it. Possibly because once I wrote this it almost sounded more like a Mike/Bill story. There are notes about the Mike/Kevin version below. (Also, I apparently have no idea how tall Bill is. This says 6'2", which must have seemed right for some reason. A quick google gives me 6'1" or 6'3", so maybe I just split the difference.)
So the wings are cool. The first time Bill saw them, whole minutes after the first time Mike saw them, he said, "You look like a dragon."
Mike obligingly growled at him, and Bill lunged. Bill was a skinny fucker, but he was six feet two inches of skinny fucker and Mike didn't want to actually hurt him so he came out on top, with Mike's wings curving up from under him to wrap around them both.
*
Somehow this was going to involve Frankie. He would think the wings are cool and accost Mike or somesuch, and then Kevin would have to corral him, and that's how Mike and Kevin would meet.