As a leg guy, I vehemently hate the way the artist draws the legs. Its asian often weirdly bend at knees legs overblown in proportions. Like they can stand straight kness touching and their feet would be so far apart you could drive a small car between them calves

. Not something a leg guy likes to see lol.
Story wise thus far I can't really say much. Didn't read the "main" story yet, watched YT recaps and anime made from it,
I like like the way MC gets into the "villain" pants, and her slowly changing who she is - thus far I didn't see something similar from reincarnated sister so hard to tell. But this could change with rest of the chapters and/or with actually reading the main story.