Jessica Kiang If ever you’ve glanced into lit-up living rooms while driving down a suburban street at dusk, or glimpsed a neighbor’s apartment over their shoulder when you drop off a package, and found yourself idly wondering not just what the inhabitants’ lives are like, but what maybe your life would be like if you occupied those exotic domestic spaces — well, has mischievous Korean miniaturist Hong Sangsoo made a movie for you. “Walk Up,” the festival darling’s latest benignly sozzled, black-and-white delight, daydreams around that idea, its gentle profundity smuggled in under cover of multilevel playfulness. The movie is a play on time, on imaginative shoestring filmmaking, and on Hong’s own persona. It’s even a play on words, with its three stories sprouting out from each other over three separate stories of the same Seoul walk-up.