I've enjoyed Sensei's work for a long time and was really happy to find one that hadn't been translated yet. Not only that, but it falls into one of my hard to find fetishes.
There's no tag for it on EH, but when I tag it on my computer I call it "Ignore". (I see someone tried to get that tag going long ago with a slightly different meaning that how I use it, but it didn't work.)
For me it comes down to: Ignore Play / Disinterested / Not Feeling It / Not Helping.
There should be little to no eye contact during sex. But all forms of sex are OK. With something like a blowjob, she isn't actually blowing him, it's more like a face-fuck while she looks to the side at something else. And she mostly refuses to do anything to help him.
Anyway, if you guys see any of that kind of stuff that hasn't been translated please do PM me with a link (I don't much look at the comments here so probably won't see it otherwise). I'd love to help get more of those into English.