After witnessing Rem's death at the hands of an insane Paladin, Klem, overcome with anger and hatred, has awakened as the Demon Lord Krebskulm. Meanwhile, an army of Fallen has surrounded Faltra. Can Diablo survive against the greatest threat the races have ever known? Will he be able to save Klem from the demon she's become?

All her life, Rem has carried the soul of the demon lord Krebskulm inside of her, terrified of letting such an evil loose on the world. But now a mysterious Fallen has told Diablo, Rem, and Shera about a ritual that could free Rem. The catch is that it means letting Krebskulm free as well... Can Diablo, a fake demon lord from the ordinary world, take on the real deal?!

Diablo, Rem, and Shera have arrived at the Bridge of Ulug only to discover that an army of Fallen are marching towards Faltra! This should be no problem for a powerful Demon Lord like Diablo...except that Diablo is actually Takuma, a video game addict who's in way over his head. Will Diablo's stats hold up in a real-life battle?

The former prime minister, Noah Gibun, is revealed to be an outsider. Like Diablo, she's a player of the MMORPG who came to this world. In order to defeat the Emperor and his overwhelming power, Noah recruits Diablo and the young Demon Lord Klem into her ranks. At first, Diablo's fear of social interaction made him refuse, but eventually... “I admit it. You are the leader.” “Thank you, Diablo. I will do everything to answer the trust you’ve placed in me.” Diablo finally decides to fight in a party...?! This is the fourteenth volume of the adventures of an earth-shakingly powerful Demon Lord (or at least someone who acts like one) taking on another world!

'" Takuma was just another awkward gamer, but a twist of fate sees him summoned to another world--in the body of a demon lord! And no one''s more terrified of the prospect than Takuma himself. He may have power, but he''s in way over his head. So he decides to pretend to be the monster he looks like, and accidentally winds up with a pair of gorgeous slaves: a voluptuous elf and cat girl. It''s not what any of them wanted, but they''ll have to figure out how to work together if they want to survive! "'

"Instruct me in swordplay, Swordmaster! I'll allow it!" Having finally become king of the elves, Diablo and Shera spend their first night as king and queen together... After, Diablo and his group return to Faltra. He visits Edelgard, deals with a crime syndicate...and bathes Klem?! After this brief pause in their journey, the group makes their way to the northern mountains located in the Demon Lord's domain. Realizing he might not win the upcoming battle with the Demon Overlord, Diablo decides to rely on the swordmaster to help him level up quickly. Will Diablo manage to master the blade, all for the sake of defeating the Demon Overlord?!

Following a sudden announcement, Second Prince Latrielle is set to take the throne. Altina is stricken with despair, and a summons to the capital means Regis is temporarily taken from her! But the princess’s tactician refuses to abandon her wish of doing away with the nation’s wars. Plagued with suspicions regarding the emperor’s death, he ventures to the capital alone, setting out to discern Latrielle’s true nature and intentions. Here is the eighth volume of a tale of war, love, and politics, woven by the bookworm and the sword princess.

For the first time since waking up in his favorite MMO, Diablo is up against an opponent that's actually as strong as he is! Galford is a mighty warrior and the governor of Faltra, but instead of keeping the peace, he's been trying to start a war with the elf kingdom! If Diablo can't defeat Galford in battle, then the whole world's in trouble!

When Shera's brother Keera tracks down Diablo and the others, he demands that Diablo remove the enslavement spell on Shera so he can take her back to the Elf kingdom. But Shera would rather stay with Diablo and Rem, even if that means staying Diablo's slave. Diablo might not be a real demon lord, but he'll have to act the part if he wants to protect Shera from her own family.