Took me a few tries but it worked out - not so easy to be an asshole towards Ron but not completely ruin the relationship with Julian...
I left the relationship with julian 0 and with ron -3 and I still couldn't get the route.
0 or bigger than 0? ;)
0 julian and ron -3, there was still a dialogue that I hadn't seen before, however, the scene continues with julian fucking ron drunk.