It's the spring semester, and Airi Sano is on top of the world! Her grades are up, she has real friends at her side, and she's joined the school play. She's even keeping out of trouble and toning down the pranks!

But when the play falls victim to some truly awful pranks, everyone immediately suspects that Airi is behind them. As suspicion mounts, it's up to her to solve the mystery and clear her own name before the imposter strikes again. Sounds like a job for Airi and her crew!