15:10 you're correct! 3racha (or whoever writes that specific song) record a guide version‚ to give an idea how the song goes vocally. they don't always even sing lyrics in the guide. when doing the official recording‚the song might end up sounding different. for example i am you guide version is not the same as the one we know and love today. i think in both parts you paused it was han singing. in the recordings there's usually producers and skz staff (manager and/or assistants) with them.
