Digging Underground, I Stumbled Upon an Immortal

They say the Demon Emperor is a force to be reckoned with, wielding power over all, bloodthirsty and heartless. Yet he goes to every length to marry the useless eldest daughter of the God of War clan, spoiling her so thoroughly that she need only lift a finger for food and clothing. “Darling, I’m hungry.” “Go ahead, sweetheart.” The Demon Emperor offers her his left arm to bite, his eyes full of affection. “Darling, I’m thirsty.” “Go ahead, sweetheart.” The Demon Emperor offers her his right arm to bite, his face tender. “Your Highness, Madam says she wants to fight.” “Bring all those underlings over to fight her.” “Your Highness, Madam says she wants to go to war.” “Bring her my golden battle armor.” “Your Highness, Madam says she wants to climb over the wall.” “...Sweetheart, I was wrong.”