I'm seriously wondering how this works though. Like, when the MC dies, does he leave an alternate timeline behind where he's dead and that's that, or does that specific timeline where he died to get erased? Meaning when he got killed by the demon lord, do the other people with him just see him dead, or did the timeline end right there right then?
If that timeline doesn't get erased, then my goodness there must be so many different timelines where the police just find this man dead in his house.