i found spanking pics on seven oops's official blog.
ttp://lineblog.me/7oops/archives/3619688.html
according to this post(written by Maiko),two girls do a dog training in their radio program named "seven oops nana mai no usa gami soo rei" (lit. "please enjoy by seven oops's Nana and Mai "in Ryukyuan languages) aired on RBC,Ryukyu Broadcasting Corporation.