Hmmm, it seems you are having fun with this series.
It's some solid progress in terms of progress on anatomy, and reminds me a bit of SrGrafo "Chloe" which he uses to develop anatomy skills.
Be aware it NSFW put for nudity not lewdity:
https://www.reddit.com/r/chloe/
In any case, I can see from the penstrokes your putting alot of though into this, and I think your doing well.
A side note of personal curiosity; I consider most of what your drawing in this series to be "cheescake" or pin up that is PG 13-ish so T, I would usually see M used for more sexual connotation with out actual lewdness or more skin/nude model, and I note you labeled the series M.
Now if that's your sorting method, or just your aesthetic assessment, I respect that, but I was curious as to your method.
Thank you for making this.