Introduction: Hei Jiu, a high school student with a withdrawn personality and secretly engaged in a black profession, was involved in a car accident during a spring outing organized by the school, and collectively traveled to a different world full of monsters. Here, he met his sister who was sold by his parents when he was a child—— —The demon slave who is trying to commit suicide: Bai Ling... If justice has a righteous hero, then darkness should also have its savior. But the savior always likes to be clean. Therefore, people like us who live in dirty sewers Rats, naturally it is impossible to get their favor. So...