I ain't seen any dudes in this particular storyline of pics.
Artist does have some other stuff that's het, yes. And also some other stuff that's yuri. But this "3 maids for the futanari princess" stuff is dude-free so far.
This is the only couple I am 100% sure is having sex all the time. Touka would not dress Hajime as a sex slave unless she was pretty close to being just that. https://dynasty-scans.com/system/releases/000/005/264/saki_ch109_04.jpg You can pretend the maid thing is functional, not sexual cosplay, but the rest of it? I think it makes Touka nervous, because Koromo-chan could walk in and see something she's too young and innocent for.