added yotsuba background image
added yotsuba background image

Admin-Kaf/Tinyboard,Admin-Kaf/Tinyboard,savetheinternet/Tinyboard,kimoi/Tinyboard,kimoi/Tinyboard,kimoi/Tinyboard,kimoi/Tinyboard,Admin-Kaf/Tinyboard,savetheinternet/Tinyboard,Admin-Kaf/Tinyboard,savetheinternet/Tinyboard