Academy City. A magical city with a population of 2.3 million, filled with countless individuals possessing extraordinary abilities. Standing at the pinnacle of that city are true monsters. The first, Accelerator. The pinnacle of existence, possessing the strongest and most evil ability to truly control the direction of all energy, the strongest and most all-powerful monster in Academy City. He will face encounters with countless worlds that transcend time and dimensions. This is a world where countless imaginative beings converge, a world of magic, a world of technology, and all sorts of people and things will mingle within it. And then, the first will experience all of this firsthand. "—Interesting, then let me see how your so-called justice actually works, heroes?" Accelerator, who has degraded himself to a villain, the most vicious and evil anti-hero, what kind of encounters will he encounter on this journey beyond dimensions? The strongest and most evil one-way dark hero awakens here. A crossover anime/manga fanfiction, the protagonist is Accelerator from the original work, striving to recreate the feel of the original A Certain Magical Index.

In the bustling tavern, a bard sang the legend of a dragon-slaying hero by the fire, while several adventurers gathered together to play monster cards. Mali finished the remaining capsule coffee in his thermos and said to the half-elf girl beside him, "Let's go, it's time to go," the kind waitress warned. "But there's a group of vicious snake-men bandits lurking on the road ahead. Why don't you wait a little longer? The Baron is already recruiting mercenaries." "No problem, we'll drive."

"Huh?! Really?! Shouldn't I be a genius?" "Why did my divination fail?" Yagyu Yume, hailed as a genius diviner, issued a death prophecy to her classmate Inoue Sawa based on her intuition: "You will be seriously injured and hospitalized tonight, and you will likely die soon. Before that, say goodbye to your loved ones." But to everyone's surprise, Inoue Sawa not only survived unscathed but also miraculously escaped various life-threatening situations. He, who should have been reborn into another world to become a hero who saves a certain Western fantasy world, was reborn by mistake and ended up in a parallel world as Ritsumoto. To help Inoue Sawa successfully fulfill his mission, the Grim Reaper keeps bringing him back to life. Fortunately, he relies on his special abilities to make friends and encounters beautiful girls time and time again, repeatedly saving lives with their help...

Beneath this world exist beings called "Monsters," rampaging, roaring, destroying, and breeding despair. And these dangerous things are spreading towards another world. The Demon King no longer fears the sun, the Honkai creates Herrschers beyond their capabilities, the Abyss begins to overturn the laws of nature, and the Witch attempts to devour the Law of the Rings… This situation seems to indicate that the world is gradually heading towards destruction. But! "Who is the one who bears all despair, brings the light of hope with a body of despair, saves countless worlds, and steals the hearts of countless beautiful girls, leaving them unable to forget her?" "That's right! It's me!!!" Miss Black Hope declared. This book is also known as "Clearly a Humanoid Monster Defined as an Ultra-Ultra-Ultra-Dangerous Containment Object, Yet Too Silly" and "Monsters Should Be Scary? Murderous? No! I Want to Create Trouble! I Want to Cause Trouble!" PS: New book uploaded, please support with all kinds of votes. PS: Two older books are already completed, one of which is three million words long. Updates are guaranteed, feel free to collect and read.