The fourth page lists the artists of some of the illustrations found throughout this doujin, and the cover is credited to an artist known as A1. I'm not sure if this is the same person as A1 (Initial-G) that already has an artist entry on Danbooru.

Endoiruye said in comment #2626451:

The fourth page lists the artists of some of the illustrations found throughout this doujin, and the cover is credited to an artist known as A1. I'm not sure if this is the same person as A1 (Initial-G) that already has an artist entry on Danbooru.

I forgot to mention this is a Comiket 66 doujin made by circle AXZ.