image retrieved from https://huaban.com/pins/2919037811/
based on a baidu reverse image search, it may have been made by this lofter user who seems to've deleted their account

Hungry_Dong said:

image retrieved from https://huaban.com/pins/2919037811/
based on a baidu reverse image search, it may have been made by this lofter user who seems to've deleted their account

Good news! It's totally that artist. They have a Pixiv account, too!

They also posted this on Pixiv, but in significantly inferior quality.