An unknown robber is stealing food from many people on the island and Machi is initially suspected due to her stealing other food amid her naturally evil behavior. After some investigating, Ikuto discovers a pattern to where the robber is stealing from, and he and his friends stake out the next two houses they expect to be hit next. In the same night, both houses get robbed by two separate culprits, but they both get away. Later, Ikuto and Suzu are going home to sleep, but one of the robbers is inside taking a bath. After some explanation, the robber introduces herself as Mei Mei who had recently washed up on the island during a storm with her friend Tona. Now Ikuto and Suzu must protect Mei Mei for the time being while they try to track down Tona.
