The Unbeatable Dungeon's Lazy Boss Monster

The era of dungeon raids has arrived. The 7 Malevolent Dungeons are dungeons considered virtually impossible to raid. Deep within the most notorious dungeon of them all, the 'Core of the Ancient', lives 'Swallow', the most powerful amongst them. "How could someone who's supposed to be the Boss Monster... doze off until humans are right in front of him?!?!" Due to the never-ending visits from humans, the Core of the Ancient's doorsteps will never be completely empty... But doesn't that also mean they will never stop nagging Swallow...?! "I-I don't want to do it." These are the struggles of a Boss Monster who just wants to relax!