Kim is very overprotective of the people he's close to. He wants to make sure that they don't get any bad habits like he had.

Like his girlfriend. They've been together for years and he feels the constant need to be with her, to protect her.

She doesn't need protecting, though. She's a soldier herself, she can handle anything that comes her way.

Except ovulation, maybe.

"Babe?" he calls out in the gym where he last saw her. The room is empty besides her at the benchpressing station.