Sourced from Pixiv but I think CherryInTheSun is active elsewhere on the net. I think they're most known for their Bumbleby art.
This was posted in May of last year. I love seeing art of the girls in casual clothing, not a lot of artists seem to do that.
I'm pretty confident you're allowed to curse here ( ＾艸＾ )
But yeah, I like the bit of personality it adds to see how Ruby's decorated her sneakers.