The Aoyoma boys(aka the four geniuses) some how got sent to the world of AoT/SnK during a Kid heist, and now theyre in pinch situation to get back home and to figure out the mystery of the Walls that has guarded the last of humanity for over a hundred years. Detective Conan & Magic Kaito belong to Gosho Aoyoma and Attack on Titan belongs to Hajime Isayama