Uh-Oh! Detention!.Kazuma, Aqua, and the three members of Tanya's unit involved in the heist undergo a hellish detention with demonic bugs entering their bodies. Emilia asks if there is a way to end their detention faster, and hears that they might be able to get out if they perform a "good deed." Later, in science class, Megumin creates a miniature explosion with her classmates' help, blowing up the water pipes and flooding part of the school...