Wow, the extra of the Dengeki Maoh September issue is a 35-page booklet of S&W.
The collaboration Yuri illustration by Keito Koume and Juu Ayakura, side story novel "A wolf and a silver sigh", the anthology comics and etc. are contained.
It seems to be the trial version of the anthology comic released in September.
I was made to buy two magazines.
Sorry, double-posting.