I Am Where the Waves Stay💌

In the Korean comments

One comment reacting to the runtime reads, in translation: "Two minutes?! Whoa, is this real?? I love that I get to see our babies sooner." The comment spells 실화냐 (silhwanya, "is this real?") as 실화누 (silhwanu) and 있어서 (isseoseo, "because there is") as 이써서 (isseoseo) — a deliberately cute, baby-talk spelling used to sound extra excited — and calls the members 울 아가들 (ul agadeul, "our babies"), a common affectionate way fans refer to idols they follow.

What the words mean

The title 난 파도가 머물던 (nan padoga meomuldeon, I, where the wave used to linger)💌 (nan padoga meomuldeon, "I, where the wave used to stay") is a sentence that stops mid-thought. 머물던 (meomuldeon, "used to stay/linger") is a modifier form that grammatically has to attach to a following noun — something like "place" — and that noun is simply left out. Paired with the 💌 emoji (an envelope with a heart, used for "love letter"), the fragment reads like a line lifted straight out of a letter or diary entry: an intentionally unfinished sentence meant to sound wistful, not a grammar mistake. Register: sentimental, poetic caption style.