Wake up and Become the Devil's Pet

Su Wei, who was weak and seriously ill in his previous life, woke up and became the pet of the demon king who was feared by everyone in Fengxuan Continent. Su Wei sighed. The system he carried was still a mentally retarded idiot, so he was asked to risk his life to open up wasteland. Su Wei did not give in to fate. Even if the idiot system doesn't save it, you only have one life, so it's no big deal to serve the bloodthirsty demon with trepidation, squeeze your shoulders and beat your legs. "Do you want to apply for a card?" "Huh?" "Fifty thousand taels or one hundred thousand taels?" "Don't you have enough money?"