Looks Can Kill

In the Korean comments

One top comment reads, in translation, “If you want to know what the choreography is like, you have to watch An Yujin’s one.” Another says Simeez’s skill is expected because she is a choreographer, but singles out Yujin for executing the movements with striking breadth and clarity.

What the words mean

합 (hap) literally means a sum or combination. In “유진이랑 시미즈 합 너무 좋음” (Yujin-irang Simijeu hap neomu joeum, “Yujin and Simeez have such great chemistry”), it means how well two performers fit together—their timing, energy, and visual compatibility—not a mathematical total. It is casual performance and fandom language.