What happened to Roppongi Shinjuu? Can't find it anywhere...Is it licensed?

i believe its just another name for "Tokyo Shinjuu"

That's pure love in roppongi.

Its part of Tokyo Shinjuu. Or at least it is at mangawall.com
Chapter 7 and 8, if I remember correctly.

Its the 2nd vol of tokyo shinjuu.. Its written there on the contents