Poppen-sensei to Kaerazu no Numa

While eating lunch by the swamp located on Udo University's campus, Professor Poppen's wristwatch suddenly stops. A strange and life threatening adventure begins as the professor transforms into various wild life of the swamp. Will he ever be able to return? <br><br> Based on the children's book series by Yoshihiko Funazaki called Poppen-sensei, which follows an assistant biology professor at Udo University who gets wrapped up in his fantasies of nature.