While fulfilling his sworn duty to shield humanity, a young knight falls in a brutal clash with demons. In an unexpected twist of destiny, he is cast into the dungeon"s lowest chambers and reborn as a Behemoth—a legendary S‑class monster of unmatched power, one of the very creatures he had sworn to keep humans safe from.
At first glance he looks like a small, orange‑furred cat, yet his true nature grants him the astonishing ability to absorb any creature"s skills. After a frantic escape that leaves him gravely wounded, he is discovered by Aria, a D‑rank adventurer. She tends to his injuries and brings him home, adopting the beast as her pet and naming him Tama.
Accepting Aria as his master while holding onto the honor of his former knightly life, Tama vows to protect her from every threat—no matter how dire—even if it means surrendering his precious second chance at life for the future.
