Poppen-sensei to Kaerazu no Numa

During a lunch break near a swamp on Udo University's campus, Professor Poppen experiences an unusual event when his wristwatch ceases to function. His unexpected transformation into different swamp creatures initiates a perilous and bizarre adventure. The series is adapted from Yoshihiko Funazaki's children's book series, which centers on an assistant biology professor at Udo University who frequently becomes immersed in his imaginative visions of the natural world.