In “How Not to Summon a Demon Lord,” Takuma Sakamoto takes center stage as the eponymous Demon Lord, Diablo, in a fantastical world filled with magic, adventure, and danger. Initially an ordinary human gamer trapped in the virtual reality of the game Cross Reverie, Takuma finds himself unexpectedly summoned to a parallel world resembling the game he once played. With his character’s formidable powers and knowledge of the game’s mechanics, Takuma assumes the role of Diablo, the feared Demon Lord, and embarks on a quest to uncover the mysteries of this new world and find a way back home. Despite his intimidating appearance and fearsome reputation, Takuma struggles with social anxiety and self-doubt, often relying on his in-game persona to navigate the challenges that lie ahead.

As Diablo, Takuma forms unlikely alliances with two female adventurers, Rem and Shera, who inadvertently summoned him to their world. Despite their initial trepidation and distrust of his demonic appearance, Rem and Shera soon come to rely on Diablo’s strength and expertise as they journey together to unravel the mysteries of their world. Along the way, Diablo must confront his own inner demons and insecurities, learning to trust in himself and his companions as they face increasingly powerful foes and unforeseen obstacles. With its blend of humor, action, and heartfelt moments, “How Not to Summon a Demon Lord” offers a compelling exploration of friendship, identity, and self-discovery as Takuma Sakamoto navigates the challenges of being both a feared Demon Lord and an ordinary human thrust into extraordinary circumstances.