Probably to keep moving. Find the others out there.

[Because if Kija is here, then surely Yona, Hak, and everyone else is somewhere in this strange new world as well.]

Either way, I'm not sure it's a good idea to remain here of all places.

[Jaeha doesn't bother asking if Kija is going to join him. Why wouldn't he want to come along? Surely the only reason he was here at all was to watch for anyone else the city decided to abduct.]