I am quite sure that this is what this chapter refers to (you think she is naked since she conveniently hides her swimsuit behind the float).
The girl is very inventive and now I read each chapter not so much for fanservice as to see what she'll come up with next to give joy to her...
I've only seen the trailers and some scenes. They hired VA that specializes in Russian (a big fan of Russian culture and stuff and even studied Russian at university I think), so the lines and pronunciation are decent.
However, there is a difference in vibes manga and anime Russian lines give...
As you was given the answer, I'll just add that translation on mangadex is way behind and you can find English chapters elsewhere up to chapter 122 (the latest one).