Paint the City Red
Paint the City Red is a story written by Mikami Ren. It ran in Issue 41 at http://s2b2.livejournal.com/238447.html, and is mirrored at http://www.shousetsubangbang.com/mirror/paint-the-city-red/.
From isis.dreamwidth.org: "Several rival gangs control the city, and the bosses of two of them have frequent hatesex."
From fail-fandomanon.dreamwidth.org: "Juan and Gabriel are leaders of two of the city's most dangerous gangs. Nominally enemies, they fuck as much as fight one another. Includes rough sex with a prostitute, references to violence and gang warfare."