The stage whirls ominously in The Wilbury Group’s lively production of Tony Award-winning rock musical Spring Awakening. It’s a tragedy about how awful it is being a teenager, set in the comfortably distant Germany of the late nineteenth century. Teachers are awful, parents are worse, and sex education doesn’t exist. (There’s on-stage masturbation and whipping and suicide as the teens try with various degrees of success to figure things out for themselves.) Katrina Pavao is particularly good as Wendla, who opens the play by begging her churchy mother to explain where babies come from. You can guess how that ends.