real or fake? #Hearts2Hearts

In the Korean comments

Two comments recognize this as a callback: one reads, in translation, “I think I saw this before—already feels nostalgic,” while another says, “I love that she did this again.” Another jokingly calls Ian “the authority on boy-group Reels dances,” framing the performance as part of a familiar specialty rather than a random dance.

What the words mean

잘생쁨 (jalsaengppum, handsome-and-pretty appeal) blends the ideas of being handsome and pretty. Here it praises Ian’s combination of both qualities in affectionate, casual internet slang.