I'm not sure but I think there is a mistake in the title : Manga Bangaichi 2012-10 doesn't contain this chapter of this manga but the 3rd, according to this site ( http://h.stack-style.org/2012-08-21-01/%E3%80%8E%E6%BC%AB%E7%94%BB%E3%81%B0%E3%82%93%E3%81%8C%E3%81%84%E3%81%A1%E3%80%8F2012%E5%B9%B410%E6%9C%88%E5%8F%B7%E3%82%92%E8%B2%B7%E3%81%84%E3%81%BE%E3%81%97%E3%81%9F#%E7%A7%98%E5%AF%86%E3%81%AB%E3%81%97%E3%81%A6%E3%81%AD )
Just need to check with manga Bangaichi (漫画ばんがいち) of this month