Ep. 3: Milky Holmes and Gentlemen Thieves infiltrate Hakkei Prison Island to uncover a mysterious treasure.

3

Milky Holmes attempt to rescue their academy by exploring Hakkei Prison Island, but are captured upon arrival. Simultaneously, Henriette and the Gentlemen Thieves infiltrate the location seeking a legendary treasure. After learning of the prize from an old man, Henriette and Milky Holmes execute a breakout plan. They fall into prison guard traps but eventually escape. The treasure turns out to be a single flower. Removing it transforms the prison into sea cucumbers. The group realizes their actions have inadvertently released numerous criminals into the city. This sequence of events highlights the chaotic consequences of their quest for the legendary item on the isolated island.