Shiro is an albino bear possessing limited intellectual capacity. He inhabits a secluded forest alongside his mother and siblings, sustaining their existence through fundamental activities like fishing and hunting. A pivotal encounter with a tortoise unexpectedly propels the family on a journey far from their territory. As they travel, they observe numerous mysterious artifacts in the environment. Their path ultimately leads to the discovery of an abandoned urban settlement. Throughout these events, Shiro operates strictly within the familial unit, maintaining a passive role by reacting to circumstances rather than initiating actions. The journey concludes upon encountering the cityscape without further development of Shiro's personal arc. His portrayal remains consistent in the original OVA narrative, with no supplementary evolution in spin-offs or extended media. Information derives exclusively from the original OVA synopsis.