Hey,
Years ago I've read an One Shot Yaoi or Douji shi and i can't remember its name.
It was definitely an NC-17 one.
What I remember is that the main character Was masturbate by his best friend. This named friend cover his eyes with his hand but the main can see what happening anyway and panic. I can’t remember if the main was straight or but but his friend masturbation was not wanted.

Thank in advance,
Bye, Aki