When the girls are at the park, Sunset Shimmer, Rainbow Dash, Rarity, and Pinkie Pie get dirty, so Fluttershy takes them to her house and gives them a bubble bath, washing them all over with soap.
Contains: Soap/washing (as that seems to be a thing and goes a little more into fetish territory for me than other wam), also mud, pie sitting, butt-scrubbing, and foot scrubbing (though the last one isn't a fetish or interest for me I know some people would appreciate it).
Chapter 2 contains olfactophilia.
Chapter 3 contains light omorashi and farts.
Chapters 4 and 5 contains more olfactophilia and light farts.
Chapter 6 contains light farts and omorashi.
Does not contain nudity.
I didn't feel the need for the Porn tag because only the butt-scrubbing parts (which only take up about a quarter of the story) are really suggestive, along with the aforementioned parts of Chapter 3, the rest should be pretty innocuous to anyone without the fetishes, but I'll add it if anyone thinks I should.
Whether or not my quality has improved, it won't have a whole lot of story to it. Don't take it too seriously, and only read if you really like any of the content mentioned above.