With graduation fast approaching, Touko, a teacher in charge of the final year's class, is having trouble with the delinquent students. In order to prevent them from repeating the year, she continues to teach them diligently every day, and this year she was able to send every student onto the stage of their dreams without a single one missing. The ceremony ended without a hitch, and Touko was alone in the empty classroom, reminiscing about the past, when suddenly the classroom door was slammed open and the delinquent students approached with fearless smiles on their faces...