I can think of these two having to be careful to not to cross boundaries in two ways. Perhaps as in a dangerous territorial boundary and a romantic one. I’m thinking mnchn are rival agents or assassins or mafia. So a fatal attraction type beat. I can hear chn saying ‘careful sweetheart, don’t get too close’ because mnho has him pinned against the wall. Mnho gets annoyed at his constant quips and brushes him off. He asks ‘what are you doing here anyway? This is our territory.’ Chan says, ‘I’m here to see you.’ Mnho is surprised for a moment, thrown off. Then chn starts to laugh and mnho rolls his eyes. Mnho says, ‘you’re lucky I don’t blow your cover.’ Chn scoffs ‘why don’t you, nothing’s stopping you.’ ‘You know why,’ Mnho says. Chn saved his life once and despite it all, mnho owes him.