Slave System, All Humans, Ghosts, Immortals and Demons Are My Slaves!

[Brainless cool] [No heroine] Xu Yan's credit cards were overdue, his rent was in arrears, his performance had been deducted, and his ex-girlfriend's wedding invitation, life pinned him to the ground and rubbed him repeatedly. Until a translucent panel unfolded before his eyes: the slave system. The first slave is his immediate boss. From then on, the positions of hunter and prey were completely reversed. Every step is a precise deduction, and every conquer is a precise attack on psychological weaknesses. A chess game of climbing from the bottom up begins. The true potential of the slave system has yet to be tapped. When the people who stepped on you in the past kneel in front of you one by one, can you still hold on to the last bottom line of human nature?