Mori no Kuma-san, Toumin-chuu.
English title: Caressing My Hibernating Bear
Japanese title: 森のくまさん、冬眠中。
Type: ONA
Episodes: 9
Source: Manga
Genres: Boys Love, Hentai
Studios: Studio Hokiboshi
Producers: Suiseisha, blackflag
Duration: 6 min per ep
Rating: Rx - Hentai

Nowa the bear lives in the forest and adopts a puppy named Airi. Before going into hibernation, Now was worried that Airi wouldn't wean. A few months after starting his hibernation, Nowa wakes up with a pleasant sensation from Airi, now an adult dog, licking his nipple saying, "I've been waiting for a long time."

(Source: MAL News)