TLDR; The author is an exhibitionist fetish hentai artist, and most of his stories are just excuses to create situations to get the girls in humiliating exposure moments.
Just look at the title:
Indecent Exposure Magical Girl
The main focus of the story is just the lewds, everything is else in the plot is just a vehicle to get to the lewds.
It's difficult to tell what's going on at times with how rough this art is
TLDR; The author is an exhibitionist fetish hentai artist, and most of his stories are just excuses to create situations to get the girls in humiliating exposure moments.