riku's Things

i completely forgot the title but the mc reincarnates into another guy’s body who is like bad tempered and a complete douche, i think he was an aristocrat and the original body of the mc is an engineer

one of the scenes i remember is him going to hell and making a contract with satan and stuff, basically fixing the roadways. while he’s there he tortures the demons and he becomes their idol because of how cruel he is then he meets the soul of the original owner of his body