THE CHOP HOUSE

They are making preparations in a suspicious room, in the image of an old chop-house.
The version with the logo is here: http://keera.noor.jp/hr187/100000/100000acc08.html
☆Jigen and Fujiko’s manga is sold on DLsite.com’s download market, so please feel free to check it out ( http://www.dlsite.com/maniax/work/=/product_id/RJ062217.html )