Jeonghan X Joshua (SEVENTEEN) '12 o'clock' Official MV

In the Korean comments

Listen for the whistle: one comment reads, in translation, “I love the whistling sound.” Another sharply separates the video from the rest of the release: “The music video was perfect. Aside from the title track, the other album tracks were disappointing. Woozi, I miss you.”

What the words mean

다하지 (da haji?, how do they have it all?)? (da haji?, literally “do all of it?”) appears after a list calling the performers pretty, handsome, cool and cute. It is a casual, admiring rhetorical question meaning, “How do they have every one of those qualities?”