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Artist's commentary
Background character faced people outdoor play illustration collection for sale
I'm selling this on BOOTH and DL.site
https://yamabatake.booth.pm/items/793958
http://www.dlsite.com/maniax/work/=/product_id/RJ221222.html
"Mob" is used here, but means "background character" rather than "enemy in a video game" as it does in English.