Yamada just wanted to be a good Dungeon Core.  His dungeon? A tourist hotspot, not a monster mash.  But his five-star monster-themed resort keeps attracting the wrong kind of guests: heroes.  Why are they trying to slay him when all he offers is goblin-led tours and slime-wrestling?  And why is his bounty constantly increasing?  Yamada just wants a quiet life, but the Hero Association seems to have other plans.