You might find something in the works of Caera1996 (https://archiveofourown.org/users/Caera1996/pseuds/Caera1996/works) She has a live journal (http://caera1996.livejournal.com) page too. I didn't look through all 70+ of her works again, but she does write shy McCoy and McKirk well. There are definitely some scenes in her Basics of Primary Ed (https://archiveofourown.org/series/45901) that fit your request, but it's a massive epic - I'd start at the beginning & read the whole thing rather than trying to pick individual scenes, which wouldn't make sense out of context anyway. I'd recommend it to any McKirk fan, regardless :-D
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She has a live journal (http://caera1996.livejournal.com) page too.
I didn't look through all 70+ of her works again, but she does write shy McCoy and McKirk well. There are definitely some scenes in her Basics of Primary Ed (https://archiveofourown.org/series/45901) that fit your request, but it's a massive epic - I'd start at the beginning & read the whole thing rather than trying to pick individual scenes, which wouldn't make sense out of context anyway. I'd recommend it to any McKirk fan, regardless :-D