Nice interesting story.MC was a doctor before he died by being burned alive due many thought he was dead. So he was cremated (Alive)Thus he goes to hell (Half-aware that he became an abnormal ghost with great strength) And then mysteriously came back to the world of living.Before he disappeared he took a dead body over and gained a wife and was a son-in-law living with the wife's family.Anyway, he owns a bookstore that after a while decided to only open at night? (Not sure)Then somewhere in chapter 30 - 40 he encountered a hell-envoy. The hell envoy was probably tired of his job and thus entrusted (Albeit with a force) to the mc and the mc thus became an envoy of hell.Translation quality: 5 star, nothing wrong with it.-Stability of updates: 5 stars, can't say anything about it cuz trials.-Story development: 4 stars, because of trials but it;s getting better.-Character design: 5 stars, author did pay attention to the design and development even in the first 60 chapters (Although I read to ch 39)-World background: 4 stars, there is somewhat revealed, but for now it's not enough for me to give 5 stars. (Within 39 chapters)