I'm Satan, but I'm looking to Repent

Aster Ruin was a man who lived a life of killing and trying to repent for those killings by killing more. Upon death, he was greeted by a voice who called himself a guide. Aster was led to nothingness, only to be greeted by a new voice. This new voice offered power, escape, anything but Aster only wished to spend his days repenting. He was next in line to be Satan though. Here he is now wondering, how the king of Hell supposed to repent for sin!