The musical “Springtime for Hitler” is supposed to be a stretch, but this romantic comedy is not: Swiss playwright Igor Bauersima based his glib, cloying play on the true story of two teenagers who met in a chat room and agreed to commit suicide together. Inexplicably, his 2000 work has achieved international success. Chatty, spunky Julie and August sit atop Norway’s 2,000-foot-high Pulpit Rock for almost 90 minutes talking about their generic adolescent alienation; noticeably absent from either character is a convincing suicidal impulse. In this production by New York-based Thalatta! Theatre International, director Doug Howe pushes his young, earnest cast to exploit the script’s quirky comedy, resulting in a breezy, lighthearted, consistently noncredible evening. Through 6/3: Wed-Sat 8 PM, Sun 3 PM, Chopin Theatre, 1543 W. Division, 773-384-0115, $12-$18, industry nights Wed 5/24 and 5/31.