Three sources I could be bothered to find:

• Tumblr (where I found it)
• Bluesky
• Mastodon (which I find much more pleasant browsing than Bluesky)

Artist has a proper gallery on Pixiv but this piece isn't in there.

Original commentary:

Commission request for Weiss and Blake. The tight jeans were my idea lol

Took the post title from just the first two words since the full commentary seemed a bit much but I didn't want to leave it untitled.