There is non con but it kinda goes both ways and both are the victims of "the bad guy"
soft spoiler explanation (first few chapters):
mc is a yakuza and is forced to do this job/position - where he needs to "collect" the ML cum
ML has been forced to "give" his cum by multiple people for years and he "rebels" against the new guy / trying to make him uncomfty/leave - and yes that also includes SA
But they really end up having a good RS.

Is this a safe read? And SA?