>>530808148
You are probably thinking of this one
They worked together in a couple of futa Fate doujinshi but they are different people

Funfact: There's now a doujinshi BA artists who is trying to imitate their style and copy a lot of the panels from their previous work.
They have done a couple of futa Karin/Asuna ones also adding feet smell into the mix, check it out https://nhentai.net/g/542145/