Haneul doesn't have a partner, that is obvious or he wouldn't be as anxious. However, respecting the other's silent wish of ending the conversation, Joseph has no choice but to pretend that he believes Haneul. Because the man does not react well when he feels cornered. At the same time, if he ends to conversation without fixing the mood, Haneul will start hurting himself again. Joseph needs to distract him, to brighten the mood. And the fastest way to do it is to tease the man with his apparent crush, "What's there to think? Isn't Ryuu the best choice? Look at that muscle-"
"What? Yah! Pfft! What?"
Ah, the misunderstanding T_T
At least we know Sangcheol is not stupid, he know Gyuri provoked Haneul first.
But Haneul is just too agitated to listen to reasons right now.
It's going to get worse from now on T____T