Jeff Hanson’s songs have a stunning fragility, as though they might dissolve into a haze of dust and sighs if you were to breathe on them the wrong way. On his final album, the Midwestern singer/songwriter’s wraithlike choirboy falsetto glows within chamber arrangements (“Night,” “Careful”) and hovers like puffs of steam over spare acoustic guitar (“Your Only Son,” “This Friend of Mine”). “You were lost, I was too,” he murmurs on “Maryann,” evoking an androgynous tenderness that lingers long after his final notes.