Ginga Densetsu: Noah

Gin, Weed, and their children, the brothers Orion and Sirius. The legend of Ginga continues to be passed down... Sirius lost his life in a fierce battle with Monsoon, a mad bear of the red beetle bloodline that attacked Oshu, a paradise for dogs. Orion, unable to fully understand Sirius' ideal of being able to understand any enemy, was unable to accept the shock of losing Sirius and disappeared. And so Orion's journey of wandering begins. What kind of dog (thing) will Orion meet on his journey...? The latest chapter of the Ginga Legend series begins!!

(Source: Nihonbungeisha, translated)