Dungeon Meshi

After the Golden Kingdom is sunk underground by an insane magician, its king emerges, promising all of his treasure to any who defeat the magician, before crumbling to dust. Guilds are spurred on by this promise, traversing the labyrinthine dungeon in search of the magician. Laios, the leader of one such guild, encounters a dragon that wipes out his party and devours his sister Falin. Despite having lost the entirety of their supplies and belongings, Laios along with Marcille, an elven healer, and Chilchuck, a halfling thief, immediately reenter the dungeon, determined to save Falin.