Nature of Anna Taki is S or M either of whether, it is only I know.

tl;dr: A manga centered around a couple swapping S and M roles that focuses too much on the S and M and not enough on the characters participating in it. This manga had an interesting concept in being BDSM based but with ambiguity on what the two main characters were with them exploring which they better fit into by swapping between them. There’s a lot that they could do with this in terms of using that to develop that characters at a broader level. Ultimately though it isn’t used all that much and though a really amusing one, it feels like like just a gimmick. Themanga is really short being only two volumes but despite that it goes through quite a few sessions. Due to this, it doesn’t really spend much time on them, and there’s only a little bit of development at a time with most of the manga being devoted to the sessions themselves. And other than the relationship between Yoshihiro and Anna, there’s no overarching plots or stories beyond those individual sessions either. Yoshihiro and Anna are the only two characters that really matter. The only even moderately important side character, Mana, was amusing when she was involved but the manga didn’t really end up doing anything major with her. In the end, there’s some quick development that was cute enough and ended things on a solid enough note that I was satisfied with the ending. But regardless, in terms of substance the manga felt pretty lacking. The art was decent enough in that there was a good style, but it was kind of rough. Also, some panels were confusing in what they were showing, though for the most part the framing was good. It kind of scratches the Nana to Kaoru itch to an extent, but with nowhere near as much depth.