From Human to Catgirl Slave in Another World

Transmigrated into the body of a catgirl and bound by contract to serve the Demon Lord of Lust, Neko awakens to a life stripped of freedom and identity. Struggling against commands he cannot disobey, he clings to the remnants of who he once was. Yet the deeper he is pulled into his new role, the more his resistance begins to fracture. In a world ruled by desire, power, and manipulation - can he escape… before he forgets he ever wanted to? — Description from novelcodex.org