“On their last track, “Blanket Me,” Hundred Waters opened the floodgates to a torrent of tension, offering the kind of catharsis that tends to arrive toward the end of an album after you’ve been simmering in it. Their latest, “Fingers,” points to where that tension might have originated. Over a cascading acoustic guitar riff, Nicole Miglis sings of a frustrated and ambivalent affair: “Some days I f”