I Signed a Contract with Yama and Started the Underworld Transaction

After a car accident, he came to the underworld, was favored by the King of Hell and signed a contract to be reborn, thus starting a mysterious transaction... In order to complete the deal, Qin Mu sacrificed everything just for a promise. The transaction is full of difficulties, countless people die inexplicably, and countless conspiracies are targeted. This is a transaction that tests human nature. Who is causing this? "You will be my chess piece from now on." "Please accept me as your disciple" "You can't kill this person!" "I'm not a kind person." "This girl is pretty good, she will be mine from now on." Qin Mu completed the deal step by step, and the whole world started to Hajime changes because of his deal. But this transaction started to become confusing! Can Qin Mu complete the underworld deal?