I don't know....At first, I thought the future vision of the isekai-ed guys dying seems far fetched because the demon king seems chill from how he let the cat demon follow the MC and how I got the feeling that he is curious rather than blood lustful (there was even a theory that he might be the MC's dad, not sure about that but it's a theory I suppose). But then again, if the heroes storm the castle to kill him, there is just so much that you can tolerate even if your end goal isn't massacring people. So I suppose that vision is very realistic which makes this more interesting