BU On Broadway’s newest production, “Little Shop of Horrors,” is a cartoon-like rendering of real-world emotions on stage, allowing the audience to experience love, lust, death and downright fun with the caricature-esque characters.

Huddled in a booth adjusting lights for the musical “The Last Five Years,” Zach Schiffman, a senior in the College of Communication, and Emma Howard, a sophomore in the College of Engineering,...