It was decided that the Expo will be held in the city of Futako Tamagawa, where Koitaro and his friends live. Known as "Nikopaku", this exhibition was an event in which a group of Sakuratsuki participated... However, production was not progressing as expected, and Kansai tried to hire a talented land cultivator to cultivate the land. Everything was disturbed by the "Goss Lori Mask". After running out of numbness, Team Leader Sakuratsuki orders his subordinates to get rid of the "Goss Lori Mask". Koitaro, a detective from the family business, helps find a "gothic loli mask"...