Faced with Rosen, a lich who had transmigrated into a coffin in a tomb with half his skeleton missing, the System gave him a punishment: bring about a calamity, or die.
With no other choice, Rosen used a system called Conquest to summon the Fourth Calamity from another world. While carving out territory from the Demon King's army and the human kingdoms and growing stronger, he also picked up “NPCs” caught between humans and demons: a lonely wandering catgirl, a lady knight who likes to “guh” her victims to death, and a runaway heretic saintess.
Too busy with his work to think about romance, Rosen finally looked up and realized the players had pulled off all sorts of outrageous stunts, while these “NPCs” were already discussing how to divide up his bones.
“Waaah, Lord Rosen, can I hold you a little longer?”
“Guh, letting me out of prison was because you wanted to...”
“Heh, weren't you the one who tied me up and brought me here? What, are you going to deny it now?”
“Demon King, please pay more attention to me!”
Wait, no!
“Why are you getting involved too, player?!”
His Majesty Ro, the unofficial Demon King and Undead Calamity, was furious.
