note QOS or Queen of Spades has been a growing niche in porn even making its way to doujins. Some Japanese artists have even caught on to this and have made doujins with this theme featuring their characters with a spade tattoo. Many doujins include darker skinned guys or even actual black guys, but what separates QOS stories from your typical interracial is that it focuses on the racial aspect of it. Women submitting and devoting themselves to another race that they deem sexually superior.