Post-rock, as a genre, has rarely lent itself to fantastical, joyous abandon. Mice Parade's Adam Pierce continues his struggle to turn the tide with Bem-Vinda Vontade, a work so loose-strung and rambunctious that filing it alongside the likes of Tortoise, Slint and The Sea & Cake almost seems heretical. Instead of crawling at the standard-issue pastoral coma pace, Pierce favors various rollicking gears, hard-strummed acoustic guitars intertwining gracefully as playful, not-quite-jazz drums patter about, strings and xylophones sometimes sneaking in, too. The insertion of vocals into the teetering surge further sweetens the proceedings, from Pierce's own omnipresent, blasé singing to the gooey, girlish coo of Múm's Krist'n Anna Valtysdóttir on "Nights Wave" to the awkward, breathy phrasing of Clammbon's Ikuko Harada on "Ground as Cold as Common." Vontade's highest highs arrive when Pierce lets his instrumentation pile up and threaten to crash: See the multiple-guitar-flutter, xylophone-soaked calamity that closes "The Days Before Fiction."