Responses
if you haven't already, you could try this
https://www.mangago.me/read-manga/sneaky_red/
starts off dodgy like this one, but develops into a proper relationship as they do some self-discovery without losing the bdsm aspect

I really enjoyed the sex scenes at the start of this series, with the choking, belts, biting, and everything. But it got vanilla the moment the relationship got healthier. I wish this could have been a healthy bdsm story, but they just lost all their fun.