This manga is great.
It starts of using BDSM as a punishment, which I don't really like, as it's coercion.
However, it delves further in and whilst a bad experience at the time, the mc starts to desire BDSM from that partner, and explores it. And it explores it at a pace of constantly pushing that boundary whilst never going over it, which shows how skilled FeMC is at BDSM, she knows how to get MC excited and get him feeling safe and wanting more without ever hurting him or putting him in a place to be harmed, even when letting another person tie him, she's ensuring his safety.
It is very similar to Nana To Kaoro in this aspect, (and not the only one which I'll get to later)
And whilst not taking as long as Nana To Kaoro, it also doesn't delve into BDSM as much as that series.
It's very heavy on just rope BDSM, with some small parts of chastity, missing out on most other aspects, which to be fair is not necessarily bad. I'd rather a Mangaka write a lot about a limited amount of things they know about, than guess or cover a lot whilst not knowing much about it, especially with a topic that can be as dangerous as BDSM.
The overall plot is good, other than a devious subplot which I am SO tired of reading.
There is a character in this series who does the typical evil smirk to the "camera" when they've finished talking to someone they've "tricked"
However, this subplot is all about how the evil smirking character wants to sleep with FeMC.
A general creep through the manga, but a minor character, right until the last two volumes where he sends his minion to get info on MC and FeMC to blackmail them and ends up assaulting FeMC in a basement somewhere and MC has to come save the day, just before FeMC is raped.
I get it, to most if not all people there is nothing worse than rape.
You really want to show that this character is Evil because look at this bad thing he is doing.
You can do this without involving rape, and if you are, you NEED to handle it better than something you can just be "saved" from and be fine, and not something where you joke around after like "oh well turns out evil man likes getting spanked now"
By seemingly every adult manga showing a topic as serious as rape as something that is just a bad thing that happens and validates that "hero" mentality people have, it removes the weight of such a monstrous act.
It cannot be the final act of a story like this evil build up to a climax of "just in time" like some 80's action hero stopping the bomb going off. If you're going to include it and try to do it any justice of just how bad a rape is, include it all, include the after affects, how someone might feel after the act, how they would deal with that trauma.
Because in books and shows like this that are primarily targeted at young men, it makes it come across that as long as there was someone there to save the day, all is well, and if in the worst case it happens to someone in their life and all this material they've read doesn't prepare them for how life changing the act can be for someone.