If you're a good, old-fashioned girl, or dating one, that single goodnight kiss at the end of date can be anything from an uninspired formality to a hint at great things on the horizon. Math and Physics Club's sophomore EP's certainly a long kiss goodnight that sends you to bed with your head in the clouds.

With a neat-and-trim four-song track listing, the Seattle band doesn't have any wiggle room on Baby I'm Yours, but it doesn't need it. Cutting across a wide slice of pop, Math and Physics Club's EP does what every great goodnight kiss does. It doesn't just make you want more, but sets your mind racing about all the possibilities in your future. The title track opens the album, with a zippy chunk of jangle-pop that bears more than a small resemblance to The Smiths, with sparkly guitar melodies punctuated by drum work that's surprisingly adept and agile. "Nothing Really Happened" relaxes a little bit, sinking into a folk-jangle hybrid that's a twee backdrop for Charles Bert's librarian-esque sighs that's more of a reminder of the band's full-length, and "In this Together" breaks out the brushes for the drum kit as the band sweetly swoops through an indie-pop/orchestral pop hybrid that's just a finger's width from becoming too precious to take seriously. "Do You Keep a Diary" closes the EP with a wonderful surprise, as the band drops into synth-pop mode, as a heavy bass line and electropop drums go nuts as guitars come in to pull the song out of the synth-pop formula and remind us of Math and Physics Club's guitar-pop origins.

Only the strapping rhythms in the opening track and the electro moments of the closer should come as a surprise to anyone who's even tangentially familiar with the Seattle band's output, but it's enough to make you start to wonder. What other tricks does the band have in store for us? What else will ignite our passions? Just like after closing the door behind you after a turn-you-to-putty goodnight kiss, we'll just have to revel in the moment and dream about what's yet to come.