my heart is thrilled by the still of your hand
[https://archiveofourown.org/works/24974482] - - public:opalsong
Jiang Cheng has been told that anal sex is a great; however, he doesn't know quite how to go about doing that. Nie Huaisang, dutiful as always in his role as best friend, helps him figure it out. (And then helps him figure out something else, too.)