I love this song!! I love the retro feel to it, but it still feels fresh. My favourite scene of the MV is when Woosung gets into the taxi and sees the silver fish, I interpret it like he's already underwater, already under her spell and he doesn't realize it yet. He describes her dimples like wells, a trap to fall into, and he has fallen into her trap immediately and doesn't realize it until later. She's kind of depicted as a beauty from the sea, using her dimples to enchant him, like a siren singing a song to draw a sailor into the ocean, especially with the scene at the end where she is driving the taxi underwater and Woosung is asleep in the back, completely fallen into her trap. :)