Looks Can Kill (eyebeam ver.)

In the Korean comments

The pairing is being read like romance-fantasy casting. One comment reads, in translation, “The northern grand duke and romance-fantasy heroine combination is legendary”; another calls them “a northern grand duke and a sunshine heroine.” 북부대공 (bukbu daegong, northern grand duke) evokes the imposing male-lead archetype common in Korean romance fantasy, while 햇살여주 (haetsal yeoju, sunshine heroine) means a bright, warm female lead.

What the words mean

얼굴합 (eolgulhap) literally means “face combination,” but here it means how well two people’s looks complement each other on screen—the visual equivalent of chemistry. It is a casual fandom compliment; one comment translates naturally as, “What is going on with their visual chemistry? It’s so pleasing.”