в твиттере уже выяснили, о чём они беседуют)))
That whole jikook 남편 / 남친 thing.. though the words are probably true (I’ve been replaying it over and over and I can’t think of any alternatives), I don’t think it’s just a response to “what am I to you?” but rather to the hand placement.

If JK puts his arm on JM’s shoulder, what will he be to JM? - 남편 Nampyeon (Husband)

If around the waist? - 남친 Namchin (Boyfriend)

Reitan, поженили, короче, их уже)))