Eiga Crayon Shin-chan Nazo Meki! Hana no Tenkasu Gakuen (movie 29) DVD

The film's story begins with Shinnosuke and his friends of "Kasukabe Defence Force" experiencing a one-week stay in "Tenkatōitsu Kasukabe Private Academy" (nicknamed "Tenkazu"), an elite boarding school that is administrated by a state-of-the-art AI. In there someone attacks Kazama. As a result, his intelligence is reduced, and strange bite marks are left on his butt. The Kasukabe Defense Force joins forces with the school's dropout student council president Chishio Atsuki to form a group of detectives and solve the mystery.