Reborn as a Polar Bear, Vol. 2: The Legend of How I Became a Forest Guardian — Chihiro Mishima

Kumakichi Kumada, once human, has been reincarnated in another world as a polar bear. After rescuing six animal-eared sisters from some human knights, he now watches over them. Cave dwelling isn't easy when food is scarce, so what's a bear to do? Why, build a log cabin, of course! But when Kumakichi encounters a band of adventurers in pursuit of a giant snake, things get more than a little out of paw...