Y/N awoke centuries ago in the endless corridors of the Lost Library of Alexandria, a mystical archive that houses every book ever written and those yet to be. As the Last Librarian, his purpose is clear: protect the library's secrets, especially the forbidden tomes containing knowledge too dangerous for any mortal to wield. His existence has been one of solitude and vigilance until the day he stumbles upon a hidden, cursed volume that tears him from the safety of Alexandria and hurls him into the unknown world of Gensokyo. Scattered across this strange land, the forbidden tomes have unleashed chaos, each one capable of granting unimaginable power. With time running out before the very fabric of the universe unravels, Y/N must gather the lost books and restore them to their rightful place. But he's not alone. In the depths of Gensokyo, he encounters Marisa Kirisame, a daring and curious witch with a penchant for collecting magical artefacts. Together, they must face ancient evils, forge unlikely alliances, and unravel the mysteries of the forbidden knowledge. In this high-stakes journey across a land of forgotten gods and powerful sorcery, Y/N will confront his lost memories, the weight of his duty, and a growing bond with a certain witch who might just hold the key to saving or dooming their world.

Two years have passed since Y/N and Marisa escaped the dream that nearly consumed reality itself. In Gensokyo, the pair has found peace, turning the echoes of that harrowing nightmare into a life they can cherish. But peace in Gensokyo is fleeting. Mysterious magicians, unbound by the Spell Card rules, have begun to wreak havoc across the land. Their unchecked magic spreads chaos, sowing fear among humans and youkai alike. Trust in witches and magicians crumbles, and whispers of a second Witch Hunt begin to take root. Caught in the storm is Marisa, the Ordinary Magician, whose every move is now under scrutiny. When fear turns into action, she and Y/N must navigate a web of suspicion, alliances, and betrayal to uncover the source of the unrest. Together, they face a question with no easy answer: how far will they go to protect Gensokyo's magic and the fragile balance that binds its people? The hunt is on, and the stakes have never been higher.

It's been a year since the Witch Hunt Incident, and Y/N has everything he could ever want, such as building a life together with his to-be wife, Marisa, that's as magical as any fantasy could offer. Yet, as their bond deepens, Y/N begins to dream of a life beyond anything he has ever known, haunted by visions of a world that is unfamiliar yet strangely intimate. In these visions, whispers of a long-buried past intertwine with disturbing changes to Gensokyo as fractures begin to threaten its very foundation. The Hakurei Shrine's barrier weakens, and familiar landscapes merge in chaotic disarray. But when Y/N and Marisa are violently pulled into the Outside World, they face reality more daunting than dreams of modern Tokyo, oblivious to Gensokyo's existence. Forced to confront a relentless enemy and the looming destruction of both worlds, Y/N must navigate the forgotten shadows of his past, protect Marisa, and unravel the mystery behind his strange visions before everything they love is destroyed.