Yurikuma Arashi

Humans built the Wall of Severance to protect themselves from bears, which became violent and attacked humans after the distant planet Kumalia exploded long ago. Its debris rained down on Earth as a meteor shower. Two bears, Ginko Yurishiro and Lulu Yurigasaki, slip past the wall and disguise themselves as humans, enrolling at Arashigaoka Academy. There, they take an interest in Kureha Tsubaki, a human girl who hates bears.