The Republic of San Magnolia has long been under attack from the neighboring Giadian Empire's army of unmanned drones known as the Legion. After years of painstaking research, the Republic finally developed autonomous drones of their own, turning the one-sided struggle into a war without casualties-or at least, that's what the government claims. In truth, there is no such thing as a bloodless war. Beyond the fortified walls protecting the eighty-five Republic territories lies the "nonexistent" Eighty-Sixth Sector.

I used to be a normal high school girl but in the blink of an eye, I woke up in a place I've never seen before and-and I was reborn as a spider?! How could something that's nothing more than a tiny spider (that's me) possibly survive in literally the worst dungeon ever? Are there no rules? There should be some rules! Who the hell is responsible for this? SHOW YOUR FACE!

For 12 years, the virtual world of Yggdrasil has served as the playground and battlefield for the skeletal lord Momonga and his guild of fellow monsters, Ainz Ooal Gown. But the guild's glory days are over, and the game is shutting down permanently. When Momonga logs in one last time just to be there when the servers go dark, something happens - and suddenly, fantasy is reality. A rogues' gallery of fanatically devoted NPCs is ready to obey his every order, but the world Momonga now inhabits is not the one he remembers.

In Orario, fearless adventurers band together in search of fame and fortune within the monstrous underground labyrinth known as Dungeon. But while riches and renown are incentive enough for most, Bell Cranel, would-be hero extraordinaire, has bigger plans. He wants to pick up girls. Is it wrong to face the perils of Dungeon alone, in a single-member guild blessed by a failed goddess? Maybe. Is it wrong to dream of playing hero to hapless maidens in Dungeon? Maybe not.

The Rakian Kingdom is on the march, a thirty-thousand-strong army headed by Ares, God of War. The target of their sudden invasion is none other than the world's greatest metropolis, Labyrinth City Orario. As the armed menace approaches in thunderous lockstep, the city's inhabitants can do nothing but...continue about their completely peaceful lives??? A prum proposes marriage, one sweet boy becomes a bodyguard, the city girl's secret comes to light, while mortals and gods alike are swept up in romance.