ok so here's why i think dongren might be living together.. if u analyze that soundcheck vid, there can be a lot of reasons why rj panicked, yes. but the first thing that comes to mind is rj's initial reaction was directed towards the fact that hc said that they rode the same car going home. which is a rare occurrence and doesnt happen very often.. now rj panicked bc he mightve though that dh would continue his statement with what happened after riding the car home (going back to their own place).