I legit don't care about the friend at all. After being there for him as his friend, begging him to go to the level thing, and then finding out he is "useless" and has no level or job to just drop him for some rando even she didn't feel any romantic feelings towards him. And now she is following along with this boyfriend, can't say we should care like at all.
I just want to know when the princess Denaris will show back up. She actually seemed to care about him even when he was low level and low power, even if she acted like a tsundere. Of course, my opinion would change if she somehow set a curse on him when she sent him back to his own world.