Lead stars step up to ‘Soundtrack #2’s’ exciting new challenges

The lovely Keum Sae-rok and the dashing Steve Sang-hyun Noh may have already won acclaim for their acting chops—she for “Youth of May” and “The Fiery Priest,” he for “Pachinko” and “Curtain Call”—but they have not played the main leads in their respective projects until the K drama series, “Soundtrack #2,” came along. In the