All images are extracted from the Full Voice HD Edition.
Arakawa Hisashi, Yoshida Seiji and Scaji are listed under "Background Graphics" in the staff credit images. VNDB also credits Akasaka Aka based on a later tweet he made claiming that he drew several of the backgrounds for Subarashiki Hibi, though he isn't listed in any of the staff credit images.
This pool isn't comprehensive.
