Disguise of Evil

[No system, no harem, slightly dark content, story dialogue flow, composed of different human indexes, jointly exploring the "origin of evil"... You know that I killed someone, but you can't arrest me...] ———— In every city, there is an abandoned mailbox that has been forgotten by people. It is the entrance to the "Eternal Kingdom". When someone delivers "evil thoughts", the messenger of the "Eternal Kingdom" will come, liberate the mimicry of "evil", make it crazy, and mark the target with death through his "purple eyes". The messenger calls himself a "postman", but like the god of death, he "collects" people's lives. He kills people, but does not kill anyone... ———— "Don't point the source of the disaster at me. It's just the "evil" in your hearts that is causing trouble. No, no, no, it should be, that's what you are like..." ———— "What exactly is your purpose?" "I just want to see what kind of evil lives in people's hearts. I just want to see what kind of "evil" really looks like under "mimicry"..." ———— "The so-called cause and effect are just the traces left behind by "evil"... I didn't do anything, because the only person who can unlock one's own shackles is the person himself..." ———— What kind of thing is human nature? Everyone is just a "disguise of evil" and a "mimicry of evil". So, what kind of "evil" exists under your skin...