Please call me Cyber ​​Demon King

On the first day of my transmigration, I was turned into a ghost by the Ghost King.Don't be afraid! [Extreme System] activated!Traverse the heavens!What doesn't kill me makes me stronger!Heh heh heh~~ Muzan Kibutsuji, I'm going to be the Demon King!S.A.W.S ...Times have changed!I want to become the "Cyber ​​Demon King"!Of course, first you need to save up money to get a high-end prosthetic body.----------------The protagonist is a ghost with a system, and he travels through various worlds.Mainly cyberpunk, with sub-Demon Slayer and other worlds. Please see the volume titles for the different worlds.Unlocked worlds: Demon Slayer, Cyberpunk 2077, Tokyo.