Looks Can Kill (eyebeam ver.)

In the Korean comments

Commenters repeatedly call the pair “영리즈” (Yeong-Liz), a nickname combining the final syllable of 원영 (Wonyoung) with 리즈 (Liz). Another comment points out a detail to watch for, reading in translation, “Whoa, the two of them are wearing matching shirts. The outfits are so pretty, and so are they.”

What the words mean

“내 심장 돌려내” (nae simjang dollyeonae) literally demands, “Give me back my heart.” Here it is a casual, exaggerated way of saying the performers are so captivating that they have stolen the commenter’s heart.