Looks Can Kill

In the Korean comments

One commenter makes an unusually specific comparison, writing in translation: “Wonyoung never loses your attention no matter who she films with, but for the first time Lee Sang-yi stole my focus. Why is his dancing so powerful and good?”

What the words mean

춤선 (chumseon, dance lines) literally refers to the “lines” of someone’s dancing. In K-pop fan language, it praises how the dancer’s body lines and movement quality look as a whole; here, it is casual, exaggerated admiration for Lee Sang-yi’s dancing.