In these new adventures, Megumin wants to become a thief after meeting a famous group of thieves who managed to steal treasure from the royal family. Accompanied by Yunyun, Cecily, and the mysterious Alice they will try to help the fatherless and the widow by robbing the corrupted and other wicked nobles. However, as usual, instead of honors, it is mainly the problems that they obtain. Will Megumin help her neighbor like a real thief? And above all, will she meet her models again?

Continuation of Kono Subarashii Sekai ni Bakuen wo! adapted from the light novel series of the same name.