How do you make a John Hughes-style teen rom-com in the new millennium? Judging by Jonathan Kasdan's " The First Time," with a self-consciousness that's sometimes painful and very occasionally true to the characters. Dylan O'Brien and Britt Robertson are the two suburban high schoolers who meet at a wild party and spend the next 48 hours falling in chatty, awkward love -- he's a reedy nice guy with the requisite eccentric friends (one a snide Brit, the other a giant silent African American), she's a winsome alt-girl with a middle-aged screenwriter's taste in music. (As in: Leonard Cohen. On vinyl.) The performances by the leads are earnest and very sweet, and Kasdan knows his Hughes ready-mades: The "older guy" boyfriend of Robertson's character is a ringer for Michael Schoeffling of "16 Candles."