[Aikawa Monako] Kawaru Shintai, Kawaranu Omoi ~Kuro Gal Zuki no Kare no Tame ni~ | a Changed Body but Unchanged Feelings (COMIC Unreal 2019-02 Vol. 77) [English] [Digital]
At the very end where she starts changing again, I'm guessing it's supposed to be because the guy she wanted unfroze, and what he wanted out of a gal changed? Thus, she shifted to fit his new interest. At least, that's the most sense I can make out of it. Really creates potential for some kind of sequel story where she keeps changing to fit his ever-evolving interests.