My Backing Is a Demon: The Dungeon Boss Is My Family

A 10-year-old boy possesses a bizarre world! Unexpectedly, a 'Find Your Relatives' system activates, and the head nurse of an S-rank dungeon turns out to be his aunt?! The Red-Clothed Ghost, the Bronze Coffin Bride, and the King of the Underworld—all demons bound by blood in one family! Trusting in his mighty demon 'backing,' he sweeps through dungeons and conquers both worlds in this thrilling fantasy!