Luta, a new race of humans that have animal genes and characteristics, quickly grew in population until humans became the minority. Now, the Luta keep humans as pets, using them to satisfy their sexual appetites and urges, something that Ernetis finds disgusting and despicable. Though he's also a Luta, he's never been fond of the way his kind treats humans. But when a party goes awry and a human named Jin breaks free from his tiger beastman keeper, Ernetis will find himself helping the brave escapee.

(Source: Seven Seas)