It's their pheromones, they bonded remember? So they feel physically, mentally and emotionally exhausted if they're apart for so long, hyesung even explained it. Are we reading the same story? This is why it's important to pay attention to the story instead of focusing on just where you want to focus.
Rage bait you failed
Look at NY other comment luv
My****
10/10 rage bait almost fell for it if I didnt see ur other comment
Omg why did hyesung leave his child, he is such and ugly brat