Beastmaster of Legends: Awaken True Power

Ethan Grant is reborn in a world of Beast Tamers and awakens a powerful system. While everyone else fights over legendary spirit beasts, he bonds with a filthy stray mutt, gets dumped by his fiancée, and becomes the laughingstock of Aster Academy. Just seven days later, the mutt evolves into the legendary Celestial Hound, and Ethan rises as a Beast Taming Master. Playing the underdog, he unlocks an ancient divine bloodline, crushes the Demon Clan, and saves the world.