Oneshot?

This has been a challenge for me to find so I am requesting assistance.
I think it was a oneshot...or was it a manga with many oneshots? I think. It was yaoi, I remember there being a 18+ scene in it.
It was a school life kind of oneshot. Theres two boys- one sitting in front of the other. The one sitting behind was learning acupuncture or something like that and would give the guy in front massages while remembering different muscles? Or were they acupuncture points? I can't remember.