Exclusive Extra Artwork #1 (Super Supporter!)
Added 2023-10-10 09:20:47 +0000 UTCI did this one for FANBOX as an exclusive Extra, so no reason why you shouldn't get it.
Extra Artwork is excluded from my Gumroad rule and will stay indefinitely as of now. I intend to do this every once in a while when I have some free time.
