Yaoi

Aries was supposed to be a simple movie extra.
    One explosion later, he opens his eyes in a real beastman world—wounded, half-naked, and no longer acting.
    Humans are extinct.
    Male humans? Impossible.
    Fertile male humans? A world-shaking miracle.
    To the Beastlords, he is a blessing.
    To the clans, he is a cause for war.
    And to the cold, teasing system inside his mind?
    > [Celestial Breeder Identified. Processing host…]
    Aries only wants to survive long enough to make sense of this world, but every beastman who scents him wants something else entirely—claim him, protect him, fight for him, or breed him.
    A single human has returned to a world built on instincts and dominance…
    …and the Beastlords will burn it down to possess him.