Toaru Majutsu no Index SS - Volume 2, Chapter 14: The Dance between Gatekeeper and Intruder. The Third Friday of September.

In the magical Yarran World, a group of extraordinary professionals ventured into dangerous places for knowledge, wealth, thrill, and honor, exploring secrets hidden in the depths of time. Coexisting with dangers, they were given a fitting name—adventurers.With so many adventurers around, there would be a few oddballs, of course. Take for instance, the swordsman who used to be a thirsty hedonist and now spent his days looking for ways to put his life in danger; the knight who saw gold coins as his ultimate pursuit; the schizophrenic and overly curious priest, and the genius mage who was prone to zoning out and could not care of himself. What kind of strange stories would these kooky individuals create when they came together?Alright, all the above are just nonsense. In truth, this is a casual story of an abnormal, unscrupulous middle-aged man and a few problematic girls undergoing self-therapy- I mean, seeking redemption.You have been solemnly warned that this story is purely fictional. If there is any glaring similarity, you probably need self-therapy too.

The boy who Sneaks in My Bedroom Window

Known as the country’s top onmyoji, Yuuma Kisaragi, who lived to the age of 99, awoke to find himself in an unfamiliar forest. A voice echoed in his mind, revealing that he had been reincarnated into another world at the age of 20.“Good morning, Master. Skip the greetings and please defeat the goblin in front of you.”The voice belonged to a skill acquired during reincarnation called “AI,” designed to assist Yuuma in his new life. When the skill, AI, took over the form of a golden-haired fox yokai, the familiar shape of Yuuma’s shikigami, he decided to embark on a new life alongside AI-chan.The onmyoji and AI-chan’s second life began, tackling various challenges and formidable enemies with the strongest spells and shikigami.

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.