Honestly, if you are getting the proper read on the MC, he would never force himself on any woman, for a number of reasons (completely discounting the fact that he obviously doesn't have to) primarily because he is a good person. The kind of "play" you're referring to isn't done with strangers. Consenting adults that know and trust each other can do such things, but for near-strangers, the line is NOT fine between consent and SA, and that is something this story has expressly avoided. The other thing you have to remember is that the MC is a cop-- however much he's bent the law to help his growing family, he is definitely not going to go that direction unless he is absolutely certain that is what his partner wants. This is as it should be, if we're talking about this MC. Kink and outright SA are two different things. The "objectification" kink was actually discussed with a myth he was introduced to in the storyline (clearly, something planned in a future chapter). We haven't seen much BDSM, but the story is still growing, and several actors are very plainly still waiting for introduction.
The MC is a decent person, so I rather doubt you'll see any sex that isn't explicitly consensual in the story. Cuckoldry has also been ruled out, which means that no matter how vile the villains, we also don't have to worry about our lovely ladies being violated like that, either. As far as I can tell, it's simply not that kind of story... and from what I've read, it never will be. I'm pretty sure everyone's ok with that, too. I hope that clears up a bit of your confusion. I'm not the author, but I have played through the story so far enough times to know that the MC isn't gay, but he IS chivalrous... and that means knowing when NOT to pillage, when not to push, when to listen,and how to be patient.
This story has depth, and is actually amazing. There is a LOT of build up for some of the characters (you specifically mentioned Jun) but if I remember correctly, there was also a warning in the introduction that this story was a "slow-burn", and if you were looking for otherwise, you might be disappointed... that's a perfect example. Again, I hope this clears up some of your confusion on the choices the author of this wonderful story has made. Cheers!