“Heathers: The Musical,” a dark musical comedy, will be staged by The Drama Group over two weekends July 28 through Aug. 6. The musical is set in the 1980s, so the show has an ‘80s rock beat. It is a story of teen love and angst that focuses on a brainy, beautiful teenage misfit who hustles her way into the most powerful and ruthless clique known as The Heathers. Her new friends pressure her to undertake acts of cruelty, but her boyfriend comes to her rescue and helps her plot her revenge. Performers include Tucker DeBolt, Zoe . . .